Squashed 'CMakeModules/' changes from 12d2b25..e83ac80

e83ac80 Adds config installation to export_package.
10ad6e3 Adds export_package and PACKAGE args to def_*
dd92677 Adds default APK target that is always built.
9d8dd00 Adds missing include to def_apk.cmake

git-subtree-dir: CMakeModules
git-subtree-split: e83ac8099e208c6e0e114d026ac1c9fb1edacee5
Merge commit '49f8084a88b398078e9a6965db6f6f9787fb9e69'
Use def_library and export_project.