[gtk+] Enable gio-unix for Quartz

[John Ralls <jralls src gnome org>]

commit 11c17efb190d9bd00a67e3fe3534df30e49546d6
Author: John Ralls <jralls ceridwen us>
Date:   Sun Jun 24 12:36:51 2012 +0100

    Enable gio-unix for Quartz
    
    Fixes a compile failure because gdbus-config uses G_OS_UNIX to guard
    gio-unix features instead of HAVE_GIO_UNIX.

 configure.ac |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 67e9ae5..9ea8533 100644
--- a/configure.ac
+++ b/configure.ac
@@ -374,6 +374,9 @@ if test "x$enable_quartz_backend" = xyes; then
   if test "x$quartz_relocation" = xyes; then
     AC_DEFINE([QUARTZ_RELOCATION], [1], [Use NSBundle functions to determine load paths for libraries, translations, etc.])
   fi
+  # Pull in gio-unix for GDesktopAppInfo usage, see at least
+  # gdkapplaunchcontext-x11.c
+  have_gio_unix=yes
 
 else
   AM_CONDITIONAL(USE_QUARTZ, false)