second test rebuild of precise pangolin

[Matthias Klose]

Another test rebuild for precise pangolin is currently running on amd64, armhf 
and i386.  The results will show up at [1].  Half of main is rebuilt, and the 
universe packages will start to build around this weekend.

The rebuild is running on the distro buildds, so please be a bit conservative 
with uploading packages (e.g. really do a successful local build before upload).

Common issues in build failures are:

  - default CFLAGS/CXXFLAGS include -Werror=format-security.
    Fixes are easy; don't stop fixing the first occurrence, but
    complete a local build.

  - Gnome pkgconfig files dropping -lm from Libs, and other
    packages not explicitly linking with -lm (resulting in symbols
    like "sqrt" and "pow" not found).

  - Some obsolete symbols in newer glib/gtk libraries.

  - Some kernel header issues.

The rebuild is already using the eglibc-2.15 packages from the 
ubuntu-toolchain-r PPA, planned for an upload on Tue, Feb 07.  The packages can 
be found at [2].

   Matthias

[1] 
http://people.ubuntuwire.org/~wgrant/rebuild-ftbfs-test/test-rebuild-20120201-precise.html
[2] https://launchpad.net/~ubuntu-toolchain-r/+archive/glibc/