ORT 1.5.3 should be able to build with OpenVINO 2021.1

Nobody has claimed this yet.

**System information**
- ONNX Runtime version (you are using): 1.5.3

**Describe the solution you'd like**
Update build to work with OpenVINO 2021.1

**Describe alternatives you've considered**
None

**Additional context**
```
-- ******** Summary ********
-- CMake version : 3.16.3
-- CMake command : /usr/bin/cmake
-- System : Linux
-- C++ compiler : /usr/bin/c++
-- C++ compiler version : 9.3.0
-- CXX flags : -fopenmp -Wnon-virtual-dtor
-- Build type : Release
-- Compile definitions : ENABLE_ORT_FORMAT_LOAD;EIGEN_MPL2_ONLY;USE_EIGEN_FOR_BLAS
-- CMAKE_PREFIX_PATH :
-- CMAKE_INSTALL_PREFIX : /usr/local
-- CMAKE_MODULE_PATH : /workspace/onnxruntime/cmake/external
--
-- ONNX version : 1.7.0
-- ONNX NAMESPACE : onnx
-- ONNX_BUILD_TESTS : OFF
-- ONNX_BUILD_BENCHMARKS : OFF
-- ONNX_USE_LITE_PROTO : OFF
-- ONNXIFI_DUMMY_BACKEND : OFF
-- ONNXIFI_ENABLE_EXT : OFF
--
-- Protobuf compiler :
-- Protobuf includes :
-- Protobuf libraries :
-- BUILD_ONNX_PYTHON : OFF
-- Looking for strtof_l
-- Looking for strtof_l - found
-- Looking for strtoull_l
-- Looking for strtoull_l - found
-- Performing Test HAS_UNUSED_BUT_SET_VARIABLE
-- Performing Test HAS_UNUSED_BUT_SET_VARIABLE - Success
-- Performing Test HAS_UNUSED_PARAMETER
-- Performing Test HAS_UNUSED_PARAMETER - Success
-- Performing Test HAS_UNUSED_VARIABLE
-- Performing Test HAS_UNUSED_VARIABLE - Success
-- Performing Test HAS_CAST_FUNCTION_TYPE
-- Performing Test HAS_CAST_FUNCTION_TYPE - Success
-- Performing Test HAS_PARENTHESES
-- Performing Test HAS_PARENTHESES - Success
-- Performing Test HAS_USELESS_CAST
-- Performing Test HAS_USELESS_CAST - Success
-- Performing Test HAS_NONNULL_COMPARE
-- Performing Test HAS_NONNULL_COMPARE - Success
-- Performing Test HAS_TAUTOLOGICAL_POINTER_COMPARE
-- Performing Test HAS_TAUTOLOGICAL_POINTER_COMPARE - Failed
-- Performing Test HAS_CATCH_VALUE
-- Performing Test HAS_CATCH_VALUE - Success
-- Performing Test HAS_MISSING_BRACES
-- Performing Test HAS_MISSING_BRACES - Success
-- Performing Test HAS_IGNORED_ATTRIBUTES
-- Performing Test HAS_IGNORED_ATTRIBUTES - Success
-- Performing Test HAS_DEPRECATED_COPY
-- Performing Test HAS_DEPRECATED_COPY - Success
-- Performing Test HAS_DEPRECATED_DECLARATIONS
-- Performing Test HAS_DEPRECATED_DECLARATIONS - Success
-- Performing Test HAS_CLASS_MEMACCESS
-- Performing Test HAS_CLASS_MEMACCESS - Success
-- Performing Test HAS_MAYBE_UNINITIALIZED
-- Performing Test HAS_MAYBE_UNINITIALIZED - Success
CMake Error at CMakeLists.txt:940 (message):
Unsupported OpenVINO version:
```

Start at CMakeLists.txt:940, where the configuration reports an unsupported OpenVINO version. Inspect the surrounding version check and build configuration, then try configuring ONNX Runtime 1.5.3 with OpenVINO 2021.1. Done means the configuration accepts that version and the build proceeds without the unsupported-version error.

Written by the indexing model from the issue text.