reprepro tends to ignore the meta information in dep11 and does not add
it in the Release files. As a result, important metadata like the icons,
text about packages, etc is not made available in the software centre.

Add a script alter_release.sh to be run after reprepro is finished but
before reprepro returns the to calling process. This script does the
following:
1. Take distribution directory as an argument
2. Fetch dep11 content for main, contrib and non-free packages
3. Remove PGP signature from InRelease file
4. Add md5sum for all files in dep11 folder to InRelease and Release
files
5. Sign the InRelease file again with GPG

Side-effects: Not known
Tested: NO
Closes bugzilla entry: https://bugs.hamaralinux.org/show_bug.cgi?id=380