Adding unittest for cProfile / profile command line interface

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2017-04-20.15:39:27.176>
labels = ['3.7', 'library']
title = 'Adding unittest for cProfile / profile command line interface'
updated_at = <Date 2017-04-21.09:00:40.560>
user = 'https://github.com/mlouielu'

bugs.python.org fields:

activity = <Date 2017-04-21.09:00:40.560>
actor = 'louielu'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2017-04-20.15:39:27.176>
creator = 'louielu'
dependencies = []
files = []
hgrepos = []
issue_num = 30118
keywords = []
message_count = 1.0
messages = ['291981']
nosy_count = 2.0
nosy_names = ['serhiy.storchaka', 'louielu']
pr_nums = ['1232']
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue30118'
versions = ['Python 3.7']