Upgrade to support LSB 4.1.

Upgrade to support LSB 4.1.

LSB changes:
- Bump Depends:
  - on libglib2.0-0  to >= 2.12.13;
  - on fontconfig    to >= 2.6.0;
  - on libglib2.0-0  to >= 2.12.13;
  - on libatk1.0-0   to >= 1.10.3;
  - on libpango1.0-0 to >= 1.10.4;
  - on libgtk2.0-0   to >= 2.10.14;
- Add Depends:
  - on libglu1;
  - on libcairo2     to >= 1.2.0;
  - on libxtst6;
  - on ghostscript-cups;
- In lsb, bump lsb-printing from Suggests to Depends.
- Add the lsb-security package.
- Drop the now-obsolete lsb-qt4 package.

Debian changes:
- libgl1-mesa-glx is the first alternative for libgl1;
- Make sure all packages have ${misc:Depends}.

Closes: #586191
LP: #385606
LP: #386128
Signed-off-by: Didier Raboud <odyx@debian.org>