cmake HAVE_WNO_MAYBE_UNINITIALIZED examples

oscarlab/betrfs portability/tests/CMakeLists.txt :25 

check_c_compiler_flag(-Wno-maybe-uninitialized HAVE_WNO_MAYBE_UNINITIALIZED)

alibaba/AliSQL storage/tokudb/ft-index/portability/tests/CMakeLists.txt :25 

check_c_compiler_flag(-Wno-maybe-uninitialized HAVE_WNO_MAYBE_UNINITIALIZED)

percona/PerconaFT portability/tests/CMakeLists.txt :25 

check_c_compiler_flag(-Wno-maybe-uninitialized HAVE_WNO_MAYBE_UNINITIALIZED)