Added love.graphics.getRendererInfo(infotype). Useful for creating more informative error reports and advanced debugging.

Returned string can be highly system-dependent, so don't rely on its output!

infotype can be "name", "version", "vendor", or "device"

src/modules/graphics/opengl/wrap_Graphics.h

@@ -98,6 +98,7 @@ int w_getCanvas(lua_State *L);
 int w_setShader(lua_State *L);
 int w_getShader(lua_State *L);
 int w_isSupported(lua_State *L);
+int w_getRendererInfo(lua_State *L);
 int w_draw(lua_State *L);
 int w_drawg(lua_State *L);
 int w_print(lua_State *L);