bash: function export hardening patch

Another day another bash version bump. This is the final version of the
patch to add a special prefix and suffix to exported functions in the
environment, preventing bugs similar to the previous two from becoming
remotely exploitable.

http://lists.gnu.org/archive/html/bug-bash/2014-09/msg00279.html

There still remain two less significant memory-access issues, dubbed
CVE-2014-7186 and CVE-2014-7187. So expect another bump soon.
http://www.openwall.com/lists/oss-security/2014/09/25/32
bash: fix CVE-2014-7186 and CVE-2014-7187

Sync up with upstream gentoo, pulling in the final version of the patch
for these issues. This is functionally equivalent to 4.2_p51 but
upstream hasn't officially announced that version yet it seems.
fleet: bump to v0.8.2
fleet: prune old version
Merge pull request #896 from marineam/build-444

Backports for fleet and bash to 444