cmake HAS_DWARF4 examples

lightspark/lightspark tests/test-runner/3rdparty/cpptrace/test/CMakeLists.txt :28 

check_cxx_compiler_flag("-gdwarf-4" HAS_DWARF4)

lightspark/lightspark tests/test-runner/3rdparty/cpptrace/test/speedtest/CMakeLists.txt :11 

check_cxx_compiler_flag("-gdwarf-4" HAS_DWARF4)