Commit 4db8f15a2576 ("glsl: move the android build scripts a level up")
dropped a generated include path for glcpp. Add it back adjusting for the
new location.
Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Chih-Wei Huang <cwhuang@linux.org.tw> Reviewed-by: Emil Velikov <emil.velikov@collabora.com>