[packman] VLC unneeded rebuilds

[Cristian Morales Vega]

The VLC about box includes the user name, host name and time of the
build. This makes build-compare think two builds are different that
otherwise would be the same. Could something similar to

FAKE_BUILDTIMESTAMP=$(LC_ALL=C date -r %{_sourcedir}/%{name}.changes
'+%a %b %e %H:%M:%S %Y')
sed -i "s/__TIMESTAMP__/\"$FAKE_BUILDTIMESTAMP\"/" matroska/KaxVersion.h

(from libmatroska)

be done?

Thanks.