Fix VBox network interface error on Linux 3.11. (Closes: #721786)

* Fix VBox network interface error on Linux 3.11. (Closes: #721786)
  - Extend 37-linux-3.11.patch
Release to unstable.
Add myself to Uploaders
update changelog for unstable
Drop patch 30-usb-warning-filters.patch
Refresh patch 27-hide-host-cache-warning.patch
Add virtualbox-guest-x11.postrm and call ldconfig in postrm
Don't ship .debug files, when we already are stripping dwarf symbols from its libraries
update changelog
Merge branch 'master' of git+ssh://anonscm.debian.org/git/pkg-virtualbox/virtualbox

* 'master' of git+ssh://anonscm.debian.org/git/pkg-virtualbox/virtualbox:
  Release to unstable.
  Fix VBox network interface error on Linux 3.11. (Closes: #721786)

Conflicts:
	debian/changelog
Merge branch 'master' into build

* master:
  Release to unstable.
  Fix VBox network interface error on Linux 3.11. (Closes: #721786)

Conflicts:
	debian/changelog
Set urgency to low