Instead of MOZ_TOOLKIT, we now have MOZ_WIDGET_TOOLKIT and MOZ_GFX_TOOLKIT.
There is also a new configure flag, --enable-gfx-toolkit which does what its
name implies.
The configure script should continue to work as before.
Changed --enable-fe to --enable-toolkit which takes a single argument.
Changed MOZ_FE to MOZ_TOOLKIT.
Removed USE_NGLAYOUT and USE_NGLAYOUT_GTK.
Removed FULL_STATIC_BUILD and --enable-min-shared.
Removed checks for gnome and qt.