debian/patches/git-updates.diff: update from upstream stable branch:

* debian/patches/git-updates.diff: update from upstream stable branch:
  - Reject IP addresses with trailing characters (CVE-2016-10739).  Closes:
    #920047.
  - Fix wrong return value for memcmp on amd64 and x32 due to mishandling
    of most significant bit (CVE-2019-7309).