Log Message:
Updated SDL2_image to 2.0.1.

Fix pkgconfig file name in override.

2.0.1:
Jeffrey Carpenter - Sat Nov 29 12:06:05 2014
 * Fixed image colorspace issue on iOS and Mac OS X
Sam Lantinga - Sun Jun 15 17:33:46 2014
 * Fixed support for transparency in XPM files
Davide Coppola - Thu Apr 17 17:30:12 2014
 * Fixed building JPEG support on Android
David Ludwig - Tue Apr 01 19:40:35 2014
 * Added support for building for Windows RT and Windows Phone
Timur - Wed Dec 11 21:24:36 2013
 * Fixed memory leak in webp image loading
Patrice Mandin - Thu Nov 07 19:15:28 2013
 * Fixed loading BMP files with large BITMAPINFOHEADER structures
Sam Lantinga - Fri Oct 11 21:54:20 2013
 * Fixed building with libpng 1.4