Add $MAEMO_CHANGES $MAEMO_GTK to EXTRA_CFLAGS
Add $MAEMO_CHANGES $MAEMO_GTK to EXTRA_CFLAGS

This makes it easier for the use to override the default CFLAGS when
running 'make'

android-808/libhildon,Cordia/libhildon,android-808/libhildon,Cordia/libhildon,Cordia/libhildon,android-808/libhildon