Incomplete proprietary license detected

@tsteenbe reported to me that https://raw.githubusercontent.com/SanjayBaby/device_x3/b218142b30a9f47b0aac3b971cd4c6bd2e4c6e9e/hal/m4u/2.0/Android.mk is not detected correctly.

The YAML scan output is:
```yaml
headers:
- tool_name: scancode-toolkit
tool_version: 30.0.0
options:
input:
- mt
--license: yes
--license-text: yes
--license-text-diagnostics: yes
--yaml: '-'
notice: |
Generated with ScanCode and provided on an "AS IS" BASIS, WITHOUT WARRANTIES
OR CONDITIONS OF ANY KIND, either express or implied. No content created from
ScanCode should be considered or used as legal advice. Consult an Attorney
for any legal advice.
ScanCode is a free software code scanning tool from nexB Inc. and others.
Visit https://github.com/nexB/scancode-toolkit/ for support and download.
start_timestamp: '2021-11-20T082119.548928'
end_timestamp: '2021-11-20T082122.081105'
output_format_version: 2.0.0
duration: '2.532198905944824'
message:
errors: []
extra_data:
spdx_license_list_version: '3.14'
files_count: 1
files:
- path: mt
type: file
licenses:
- key: commercial-license
score: '93.85'
name: Commercial License
short_name: Commercial License
category: Commercial
is_exception: no
is_unknown: no
owner: Unspecified
homepage_url:
text_url:
reference_url: https://scancode-licensedb.aboutcode.org/commercial-license
scancode_text_url: https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/licenses/commercial-license.LICENSE
scancode_data_url: https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/licenses/commercial-license.yml
spdx_license_key: LicenseRef-scancode-commercial-license
spdx_url: https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/licenses/commercial-license.LICENSE
start_line: 1
end_line: 8
matched_rule:
identifier: commercial-license_proprietary_108.RULE
license_expression: commercial-license
licenses:
- commercial-license
referenced_filenames: []
is_license_text: no
is_license_notice: yes
is_license_reference: no
is_license_tag: no
is_license_intro: no
has_unknown: no
matcher: 3-seq
rule_length: 61
matched_length: 61
match_coverage: '100.0'
rule_relevance: 100
matched_text: |
Copyright Statement:
#
# This software/firmware and related documentation ("[MediaTek] Software") are
# protected under relevant copyright laws. The information contained herein
# is confidential and proprietary to [MediaTek] Inc. and/or its licensors.
# Without the prior written permission of [MediaTek] inc. and/or its licensors,
# any reproduction, modification, use or disclosure of [MediaTek] Software,
# and information contained herein, in whole or in part, shall be strictly prohibited.
- key: public-domain-disclaimer
score: '20.31'
name: Public Domain Disclaimer
short_name: Public Domain Disclaimer
category: Public Domain
is_exception: no
is_unknown: no
owner: Unspecified
homepage_url:
text_url:
reference_url: https://scancode-licensedb.aboutcode.org/public-domain-disclaimer
scancode_text_url: https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/licenses/public-domain-disclaimer.LICENSE
scancode_data_url: https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/licenses/public-domain-disclaimer.yml
spdx_license_key: LicenseRef-scancode-public-domain-disclaimer
spdx_url: https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/licenses/public-domain-disclaimer.LICENSE
start_line: 15
end_line: 17
matched_rule:
identifier: public-domain-disclaimer_30.RULE
license_expression: public-domain-disclaimer
licenses:
- public-domain-disclaimer
referenced_filenames: []
is_license_text: yes
is_license_notice: no
is_license_reference: no
is_license_tag: no
is_license_intro: no
has_unknown: no
matcher: 3-seq
rule_length: 64
matched_length: 13
match_coverage: '20.31'
rule_relevance: 100
matched_text: |
DISCLAIMS ANY [AND] [ALL] WARRANTIES,
# EXPRESS OR IMPLIED, [INCLUDING] [BUT] [NOT] [LIMITED] [TO] [THE] [IMPLIED] WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
- key: mit
score: '45.95'
name: MIT License
short_name: MIT License
category: Permissive
is_exception: no
is_unknown: no
owner: MIT
homepage_url: http://opensource.org/licenses/mit-license.php
text_url: http://opensource.org/licenses/mit-license.php
reference_url: https://scancode-licensedb.aboutcode.org/mit
scancode_text_url: https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/licenses/mit.LICENSE
scancode_data_url: https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/licenses/mit.yml
spdx_license_key: MIT
spdx_url: https://spdx.org/licenses/MIT
start_line: 16
end_line: 17
matched_rule:
identifier: mit_758.RULE
license_expression: mit
licenses:
- mit
referenced_filenames: []
is_license_text: no
is_license_notice: yes
is_license_reference: no
is_license_tag: no
is_license_intro: no
has_unknown: no
matcher: 3-seq
rule_length: 37
matched_length: 17
match_coverage: '45.95'
rule_relevance: 100
matched_text: |
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE [IMPLIED] WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE [OR] NONINFRINGEMENT.
license_expressions:
- commercial-license
- public-domain-disclaimer
- mit
percentage_of_license_text: '16.2'
scan_errors: []
```