Fix flags so that they work for mac and non-mac.



g++ -c -m64 -pipe -O2 -O3 -Wall -Wno-deprecated -Wno-unused-local-typedefs -Wno-unused-parameter -w -D_REENTRANT -fPIE -DAPP_VERSION=\"3.0.1\" -DAPP_BUILD=\"-rc2-dev\" -DAPP_TARGET=\"mudlet\" -DLUA_DEFAULT_PATH=\"/usr/local/share/mudlet/lua\" -DQT_NO_DEBUG -DQT_OPENGL_LIB -DQT_MULTIMEDIA_LIB -DQT_WIDGETS_LIB -DQT_UITOOLS_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I/usr/share/qt5/mkspecs/linux-g++-64 -I. -I. -I/usr/include/lua5.1 -Iirc/include -I/usr/include/qt5 -I/usr/include/qt5/QtOpenGL -I/usr/include/qt5/QtMultimedia -I/usr/include/qt5/QtWidgets -I/usr/include/qt5/QtUiTools -I/usr/include/qt5/QtNetwork -I/usr/include/qt5/QtGui -I/usr/include/qt5/QtCore -I. -I. -o dlgComposer.o dlgComposer.cpp

That's one of the travis command lines for a release build. I don't know how to do a qmake debug build yet, though it can't be that hard.

The -O3 is what we add, the -O2 is the default, so it is needed. I suspect that the -g and the -O0 are not needed, however, I need to figure out how to test that.