Manual ANGLE roll. Update to our BUILD.gn to gen ANGLE's commit.h

Change-Id: I2935504caae35b612280691240fa4fff825632e3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/273268
Reviewed-by: Julia Lavrova <jlavrova@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
2 files changed