Prior attempt to use pipe operator in Build-Depend: list isn't
working, daily builds are failing for Quantal. Reverting back
to a control file that should work on both platforms, with the
Quantal-specific ready for release packaging.
Per a suggestion from Seb, this adds Messaging Menu as a hard
dependency for Geary, but if the build system doesn't find it, it
will fall back on libindicate. This means our packaging should
work for both Precise and Quantal.
Because Messaging Menu isn't available on Precise, a special
debian/control.quantal file is introduced here. We should move to
using it solely when we phase out Precise support.
