Import Debian changes 1.9-2.2

Import Debian changes 1.9-2.2

gzip (1.9-2.2) unstable; urgency=medium

  * Non-maintainer upload.

  [ Niels Thykier ]
  * Cherry-pick patch from gnulib upstream to make gzip build
    with glibc/2.28.  (Closes: #915150)
  * Declare that gzip does not need (fake)root for building the
    debs.
  * Add patch to remove incorrect -Wabi as -Wabi should always
    take a parameter (e.g. -Wabi=11) and it fails with -Werror=abi.
  * Add a patch to remove -Werror(=...) as it trips on some gnulib
    code.
  * Include autopkgtest based on the version by Steve Langasek for
    Ubuntu.
  * Remove fallback code to use dh_clean -k.
  * Remove usage of deprecated -s parameter for debhelper commands
    (replacing them with "-a").
  * Add a Homepage field.  Thanks to Jakub Wilk for the suggestion.
    (Closes: #888619)
  * Remove empty lintian override directory.

  [ Andreas Henriksson ]
  * Set GREP=grep during configure, otherwise zgrep embeds the full
    path. (Closes: #914907)