Combined with the outstanding shiny CLs and prebuilt ANGLE dlls in the
right place, this makes it possible to run example/basic on a windows
machine.
Eventually this shiny backend will also replace the app package's
custom darwin_amd64 and linux_x11 backends.
For golang/go#9306
Change-Id: Ia4bf9a85b9d903d79cee36abb470a0ad57f09f36
Reviewed-on: https://go-review.googlesource.com/17777
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
