Bug#1076950: libdmapsharing: Do not package C files generated from Vala

[upils]

Source: libdmapsharing
Version: 2.9.41-3build2
Severity: minor
X-Debbugs-Cc: paul.mars at canonical.com

Dear Maintainer,

While trying to solve https://bugs.debian.org/1075165 we noticed this package contains C files generated from Vala files in the tests directory. I understand the best practice would be not to package these C files and have them generated at build time. 

I suppose doing so would also help prevent the current FTBFS from happening by making sure generated C files are always up-to-date with the Vala ones and thus relying on valac to generate correct C files.