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 'bec1b52c1439c379e46e7e85e8855d52506624ba'
Use export_package and def_library.