pytorch

dbeda994 - Update FindvecLib.cmake for macOS 10.14, 10.15 and Big Sur (#51288)

Update FindvecLib.cmake for macOS 10.14, 10.15 and Big Sur (#51288) Summary: When compiling libtorch on macOS there is the option to use the `vecLib` BLAS library from Apple's (Accelerate)[https://developer.apple.com/documentation/accelerate] framework. Recent versions of macOS have changed the location of veclib.h, this change adds the new locations to `FindvecLib.cmake` To test run the following command: ``` BLAS=vecLib python setup.py install --cmake --cmake-only ``` The choice of BLAS library is confirmed in the output: ``` -- Trying to find preferred BLAS backend of choice: vecLib -- Found vecLib: /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Accelerate.framework/Versions/Current/Frameworks/vecLib.framework/Versions/Current/Headers ``` Pull Request resolved: https://github.com/pytorch/pytorch/pull/51288 Reviewed By: jbschlosser Differential Revision: D26531136 Pulled By: malfet fbshipit-source-id: ce86807ccbf66973f33b3acb99b7f40cfd182b9b