package: removed MinGW32 Jenkins CI configuration.

Can't test it on my system anymore and it would only be getting stale
and more useless over time.
Shaders: fix build on ES3.

I'm starting to hate these rushed prerelease fixes.
ObjImporter: fix compilation on Android.
Platform: fix AndroidApplication compilation.

Using type before it was defined. Blind changes FTW!
Platform: oh god what have I done.
Merge branch 'master' into compatibility

Conflicts:
	src/Magnum/Platform/AndroidApplication.cpp