tools/git-sync-deps works with either python

Bug: skia:9079
Change-Id: Id172efad6bbfaeb1d1f6bc00bcda622588f0a924
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/263355
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Commit-Queue: Joe Gregorio <jcgregorio@google.com>
Auto-Submit: Hal Canary <halcanary@google.com>
2 files changed