DefinePlatformSpecific.cmake: handle RelWithDebInfo and MinSizeRel configurations #3466
Description
In https://github.com/pocoproject/poco/blob/master/cmake/DefinePlatformSpecifc.cmake#L27, also handle CMAKE_C_FLAGS_RELWITHDEBINFO, CMAKE_CXX_FLAGS_RELWITHDEBINFO, CMAKE_C_FLAGS_MINSIZEREL and CMAKE_CXX_FLAGS_MINSIZEREL:
set(CompilerFlags
CMAKE_CXX_FLAGS
CMAKE_CXX_FLAGS_DEBUG
CMAKE_CXX_FLAGS_RELEASE
CMAKE_CXX_FLAGS_RELWITHDEBINFO
CMAKE_CXX_FLAGS_MINSIZEREL
CMAKE_C_FLAGS
CMAKE_C_FLAGS_DEBUG
CMAKE_C_FLAGS_RELEASE
CMAKE_C_FLAGS_RELWITHDEBINFO
CMAKE_C_FLAGS_MINSIZEREL
)