Added initial support for MFi game controllers on iOS.

configure

@@ -23433,6 +23433,7 @@ $as_echo "#define SDL_FILESYSTEM_HAIKU 1" >>confdefs.h
         EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,AudioToolbox"
         EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,CoreGraphics"
         EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,CoreMotion"
+        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,GameController"
         ;;
     *-*-darwin* )
         # This could be either full "Mac OS X", or plain "Darwin" which is