ANDROID: Fix comment

For coherence sake

backends/platform/android/touchcontrols.cpp

@@ -30,7 +30,7 @@
 // which gets messed up by our override mechanism; this could
 // be avoided by either changing the Android SDK to use the equally
 // legal and valid
-//   __attribute__ ((format(printf, 3, 4)))
+//   __attribute__ ((format(__printf__, 3, 4)))
 // or by refining our printf override to use a varadic macro
 // (which then wouldn't be portable, though).
 // Anyway, for now we just disable the printf override globally