Don't touch signals-marshal.list if it's already up to date
Don't touch signals-marshal.list if it's already up to date

By touching it, every source file using salut's marshallers is rebuilt whenever you
change any other source file, because Make always thinks the signals-marshal.h has changed.

freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut