FL-1777: do not force vapigen use flag as it absent in vala-0.26.1
brasero update
FL-1648: update libgit2
FL-1637: libgdata update
FL-1637: shotwell update
Sync back to main tree.
Merge remote-tracking branch 'upstream/master'
Add evolution-data-server to DEPEND
Lower minimum version for evolution-data-server.

From >= 3.13.6 to >= 3.12.4
Add mail-client/evolution to DEPEND.