Fix f6 debug/profiler display

After fonts were re-engineered the height of the f6 debug/profiler display would only display about 2-3 lines of text.
Merge remote-tracking branch 'minetest/master' into stable
Merge remote-tracking branch 'upstream/stable'
update src/IrrOculusVR
Merge remote-tracking branch 'upstream/master' into oculus