Skia: Fix path to OpenGL Headers

PS2: make it depending on nothing
This patch will change the path to point to the correct location
of the OpenGL Headers. The path has changed to
frameworks/native/opengl/include/.
from here: https://github.com/VanirAOSP/external_skia/commit/1aee72f789b38fa202d3ec19afc793cc94f163e7