Cleanup license_text to remove missing license files The initial list of files speficied for license_text in generate_android_bp.py included license files that aren't present after issuing: git clean -f -x -d -f While the list will build correctly when rolling ANGLE locally, since roll_aosp.sh doesn't issue a 'git clean', it fails to build on the Android presubmit bots. Bug: b/191882454 Test: git clean -f -x -d -f ; m ANGLE -j50 Change-Id: I31efba1f5030b118838ba1a21501f32200c93db3 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3046958 Reviewed-by: Tim Van Patten <timvp@google.com> Commit-Queue: Tim Van Patten <timvp@google.com>