opengles renderer: added CHECK_GL_ERROR defie for gl debugging

This commit add CHECK_GL_ERROR define to decoders/renderer which enables various
glGetError() calls. Also changed emugen to add glGetError() after every dispatch call (based on
defintion of CHECK_GL_ERROR). Also cleaned some annoying printf's.

tools/emulator/opengl/shared/OpenglCodecCommon/GLErrorLog.h

@@ -0,0 +1,18 @@
+#ifndef __GL_ERROR_LOG_H__
+#define __GL_ERROR_LOG_H__
+
+#include "ErrorLog.h"
+
+#ifdef CHECK_GL_ERROR
+void dbg(){}
+#define GET_GL_ERROR(gl)  \
+    {   \
+        int err = gl.glGetError();    \
+        if (err) { dbg(); ERR("Error: 0x%X in %s (%s:%d)\n", err, __FUNCTION__, __FILE__, __LINE__); }  \
+    }
+
+#else
+#define GET_GL_ERROR(gl)
+#endif
+
+#endif //__GL_ERROR_LOG_H__