Add a missing GNU Make dependency for the GIR file.
Closes: https://bugzilla.gnome.org/show_bug.cgi?id=703709
• Bug 703402 — Backend support libraries don't set the GIR version and namespace
• Bug 703450 — Telepathy backend gir fails to link
• Bug 703514 — Can't build FolksTelepathy-0.6.gir
+• Bug 703709 — can't compile folks. fails at GISCAN TpLowlevel-0.6.gir
API changes:
• Add PresenceDetails.client_types
TpLowlevel-$(API_VERSION_DOT).typelib \
$(NULL)
+TpLowlevel-$(API_VERSION_DOT).gir: libtp-lowlevel.la
+
#------------------------------------
# Folks Telepathy
#------------------------------------