cmake HAVE_ERROR examples

mysql/mysql-router ext/protobuf/CMakeLists.txt :90 

CHECK_CXX_COMPILER_FLAG("-Werror" HAVE_ERROR)

mysql/mysql-router ext/yassl/CMakeLists.txt :83 

CHECK_CXX_COMPILER_FLAG("-Werror" HAVE_ERROR)

mysql/mysql-router src/mock_server/src/CMakeLists.txt :49 

check_cxx_compiler_flag("-Werror" HAVE_ERROR)

mysql/mysql-router src/plugin_info/CMakeLists.txt :34 

check_cxx_compiler_flag("-Werror" HAVE_ERROR)

mysql/mysql-router src/plugin_info/tests/CMakeLists.txt :36 

check_cxx_compiler_flag("-Werror" HAVE_ERROR)