[build] Add python_library for markupsafe

Change-Id: Ia068f1922980eb4c861e42c8eccdde4bfdb978af
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/markupsafe/+/511340
Reviewed-by: Shai Barack <shayba@google.com>
2 files changed