Switch to modern ways to add compiler flags/link libraries

[PhysSong]

Currently our CMake scripts use three ways(I don't know if there are more) to add compiler:

• add_definition
• set_target_properties with COMPILE_FLAGS property

And for link libraries:

• set_target_properties with LINK_FLAGS property
• target_link_libraries

Some compiler requires those flags to be placed in appropriate places, e.g. #4030 (comment). It seems like target_link_libraries has some advantages over LINK_FLAGS way.
Modern CMake (2.8.12 and newer) provides a new way to add compiler flags: target_compile_options. Using COMPILE_FLAGS has been deprecated since this one is introduced.