Compile tp-lowlevel.vapi before libfolks_telepathy_la_vala.stamp
Compile tp-lowlevel.vapi before libfolks_telepathy_la_vala.stamp

The make rules generated by Automake are all done in terms of a "stamp"
file in the $(srcdir), so if we want to give it more dependencies,
we need to do the same. This fixes a clean out-of-tree build.

Bug: https://bugzilla.gnome.org/show_bug.cgi?id=697188
Signed-off-by: Simon McVittie <2b470b34502dbf3ba4bcc04ea7e64f4e0e104f33@collabora.co.uk>
Reviewed-by: Philip Withnall <3ba3974e96044dcde818e6310ed799abe10671d4@tecnocode.co.uk>

renatofilho/folks,renatofilho/folks2,GNOME/folks,renatofilho/folks,pwithnall/folks,GNOME/folks,renatofilho/folks,renatofilho/folks2,pwithnall/folks,renatofilho/folks,renatofilho/folks2,GNOME/folks,pwithnall/folks,renatofilho/folks2