Add a corresponding GL internal format to ANGLE format set. This is
one step on the way to removing the problematic DXGI format to GL
format mapping. This will also make it possible to stop storing the
DXGIFormat field in RenderTarget11. The DXGIFormat field in
RenderTarget11 can currently carry either the DSV format, the RTV
format or the texture storage format of the resource it is managing,
which makes code using it hard to understand.

Also fills in missing componentType for some compressed ANGLE formats
in texture_format_data.json.

BUG=angleproject:1244
TEST=angle_end2end_tests

Change-Id: I87eedca8736aeface3fa6a0ec3c9d355cf006b24
Reviewed-on: https://chromium-review.googlesource.com/328961Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>