[llvm] Update WinMsvc.cmake's fms-compatability to match llvm's prereqs

llvm's minimum fms-compatability-version was just bumped to 19.14 and
thus the WinMsvc.cmake file needs to be adjusted accordingly.

Author: lanza

llvm/cmake/platforms/WinMsvc.cmake

@@ -248,7 +248,7 @@ set(CROSS_TOOLCHAIN_FLAGS_NATIVE "${_CTF_NATIVE_DEFAULT}" CACHE STRING "")
 set(COMPILE_FLAGS
     -D_CRT_SECURE_NO_WARNINGS
     --target=${TRIPLE_ARCH}-windows-msvc
-    -fms-compatibility-version=19.11
+    -fms-compatibility-version=19.14
     -imsvc "${ATLMFC_INCLUDE}"
     -imsvc "${MSVC_INCLUDE}"
     -imsvc "${WINSDK_INCLUDE}/ucrt"