[gtk-osx] Unpin glib and convert to meson in unstable.

[John Ralls <jralls src gnome org>]

commit a9f1dc0f01054dcc744985d8cf9b72559eee0d80
Author: John Ralls <jralls ceridwen us>
Date:   Fri Jun 7 22:43:01 2019 -0700

    Unpin glib and convert to meson in unstable.

 modulesets-unstable/gtk-osx.modules | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/modulesets-unstable/gtk-osx.modules b/modulesets-unstable/gtk-osx.modules
index 2282237..76518b0 100644
--- a/modulesets-unstable/gtk-osx.modules
+++ b/modulesets-unstable/gtk-osx.modules
@@ -73,12 +73,12 @@
     </systemdependencies>
   </systemmodule>
   
-  <autotools id="glib" autogenargs="--disable-dtrace --with-pcre=internal">
-    <branch revision="glib-2-58"/>
+  <meson id="glib" mesonargs="-Dinternal_pcre=true -Dlibmount=false">
+    <branch/>
     <dependencies>
       <dep package="libffi"/>
     </dependencies>
-  </autotools>
+  </meson>
 
   <autotools id="libffi" autogenargs="--disable-builddir"
              autogen-sh="autoreconf" supports-non-srcdir-builds="no">