devel/awscli: Update to 1.11.13.

• Set new maintainer (bradleythughes@fastmail.fm).
• Set LICENSE_FILE.
• Match upstream by setting RUN_DEPENDS to version 1.4.70 for devel/py-botocore and version 0.1.9 for net/py-s3transfer.

PR: 213755
Submitted by: bradleythughes@fastmail.fm (new maintainer)
Approved by: swills (mentor)
Differential Revision: https://reviews.freebsd.org/D8350