Squashed 'CMakeModules/' changes from 9ce9913..12d2b25

12d2b25 Moves AndroidUtils functionality into def_library.
8865abd Adds ASSIMP, FREEGLUT and GLEW.

git-subtree-dir: CMakeModules
git-subtree-split: 12d2b251dbc4817bfadb9a12be14dcfd9b779d0b
Merge commit '0d45abba7a763d156626aef8ff9880d7755ecb28'