[infra] Make git-sync-deps truncate directory from beginning

Instead of seeing something not super helpful like:
/home/kjlubick/skia/skia/third_pa... @ 169895d529dfce00390a20e69c2f516066fe7a3b

With this change, that becomes:
...rd_party/externals/d3d12allocator @ 169895d529dfce00390a20e69c2f516066fe7a3b

Change-Id: Ie5483a5540f408719f797efdcb50d24b97b568fd
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/471456
Reviewed-by: Ben Wagner <bungeman@google.com>
1 file changed