Squashed 'android/jni/SDL/' changes from a367fb3..a625a97

a625a97 WinRT: fixed an invalid comment in SDL_GetPrefPath() (for WinRT)
f5235d1 WinRT: allowed 'roaming' and 'temp' folder paths to be retrieved on WinPhone 8.1
0d5f56d Fixed typo in header file documentation comment.
bbde326 Fixed bug 2726 - WinRT touches not setting 'which' field in virtual mouse events
0be2418 Corrected header file documentation comment.
203977f WinRT: updated README-winrt.md to detail Visual Studio 2013 Community support
104ec04 WinRT: made SDL_GetPlatform() return "WinRT" and not 'Unknown'
6344202 WinRT: build fix for Visual C++ 2013 Update 4
9fdc231 Fixed gcc-fat.sh failing to build Objective-C sources correctly.
8a11deb WinRT: fixed multi-touch bug whereby 2nd, 3rd, etc. fingers weren't moving

git-subtree-dir: android/jni/SDL
git-subtree-split: a625a97433ff32661ddedb8cb0acacca082fa091
Merge commit '6c88842ee1d22f30b152e589010af3d932bc9bc6'