fix opengl runtime to use OpenGL/gl3.h for macOS (#833)

* fix opengl to OpenGL/gl3.h for APPLE

* use glfw3 to include gl.h header

src/runtime/opengl/opengl_common.h

@@ -11,7 +11,9 @@
 #include <tvm/runtime/packed_func.h>
 #include <tvm/runtime/device_api.h>
 #include <dmlc/logging.h>
-#include <GL/gl.h>
+#if defined(__APPLE__)
+#define GLFW_INCLUDE_GLCOREARB
+#endif
 #include <GLFW/glfw3.h>
 #include <string>
 #include <tuple>

src/runtime/opengl/opengl_device_api.cc

@@ -27,10 +27,12 @@ static const char* GLGetErrorString(GLenum error) {
       return "GL_INVALID_VALUE";
     case GL_INVALID_OPERATION:
       return "GL_INVALID_OPERATION";
+#if !defined(__APPLE__)
     case GL_STACK_OVERFLOW:
       return "GL_STACK_OVERFLOW";
     case GL_STACK_UNDERFLOW:
       return "GL_STACK_UNDERFLOW";
+#endif
     case GL_OUT_OF_MEMORY:
       return "GL_OUT_OF_MEMORY";
     default: