The dxgi_format_map_autogen.cpp was updated, but the generating script
was missed to submit in https://crrev.com/c/1142299.

Bug: angleproject:2729

Change-Id: I8d726854581d27881a737f12457482ac955e6312
Reviewed-on: https://chromium-review.googlesource.com/1242853
Commit-Queue: Jie A Chen <jie.a.chen@intel.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>