cmake: platform: also detect clang by C_COMPILER_ID: C_COMPILER may vary (cherry picked from commit 774e22ec4a8859664ace0a532c2ab4ae220e5cc9)
cmake: platform: also detect clang by C_COMPILER_ID: C_COMPILER may vary (cherry picked from commit 774e22ec4a8859664ace0a532c2ab4ae220e5cc9)