deb: make wheezy build-depend on more stuff

The build-dependencies for Debian have been neglected, while the
build-dependencies for Ubuntu have been maintained.

This commit copies the build-dependencies from Precise to Wheezy.
Merge remote-tracking branch 'origin/v2.5_branch'

Conflicts:
	debian/configure
po Submakefile : corrected an error
Merge branch 'master' of ssh://norbert@git.linuxcnc.org/git/linuxcnc.git