cmake COMPILER_RT_HAS_GR_FLAG examples

Lewuathe/mlir-hello thirdparty/llvm-project/compiler-rt/cmake/config-ix.cmake :124 

check_cxx_compiler_flag(/GR COMPILER_RT_HAS_GR_FLAG)

trailofbits/polytracker polytracker/src/compiler-rt/cmake/config-ix.cmake :88 

check_cxx_compiler_flag(/GR COMPILER_RT_HAS_GR_FLAG)

CTSRD-CHERI/cheribsd contrib/subrepo-cheri-compiler-rt/cmake/config-ix.cmake :102 

check_cxx_compiler_flag(/GR COMPILER_RT_HAS_GR_FLAG)