GLInterface: Fix VideoSW on linux + OSX (v2)

Our Video Software backend isn't OpenGL Core compatible, so we need a flag to alloc a compatible one.

v2: Fix AGL profile selection.

Source/Core/VideoBackends/OGL/GLInterfaceBase.h

@@ -29,7 +29,7 @@ public:
 	virtual void SetMode(u32 mode) { s_opengl_mode = GLInterfaceMode::MODE_OPENGL; }
 	virtual u32 GetMode() { return s_opengl_mode; }
 	virtual void* GetFuncAddress(const std::string& name) { return nullptr; }
-	virtual bool Create(void *window_handle) { return true; }
+	virtual bool Create(void *window_handle, bool core = true) { return true; }
 	virtual bool MakeCurrent() { return true; }
 	virtual bool ClearCurrent() { return true; }
 	virtual void Shutdown() {}