Android: potentially work around a Qualcomm Adreno driver bug which prevented videos from being loaded into vram.

src/modules/graphics/opengl/OpenGL.h

@@ -169,6 +169,14 @@ public:
 		 **/
 		bool texStorageBreaksSubImage;
 
+		/**
+		 * An Android device with an Adreno 630 (supposedly GLES3.2-capable)
+		 * fails with GL_INVALID_OPERATION in glTexImage2D if the image is
+		 * GL_R8, despite the GLES 3.0 spec mandating support for that format.
+		 * It's possible more Adreno GPUs / drivers are affected as well.
+		 **/
+		bool brokenR8PixelFormat;
+
 		/**
 		 * Other bugs which have workarounds that don't use conditional code at
 		 * the moment: