[glib/glib-2-58: 1/2] meson: pin the libffi wrap file to the last release supporting meson 0.47

[Philip Withnall <pwithnall src gnome org>]

commit 04cde53ac7fb5166e4bb15c8c41694af66f87f41
Author: Christoph Reiter <creiter src gnome org>
Date:   Tue Nov 27 08:01:17 2018 +0100

    meson: pin the libffi wrap file to the last release supporting meson 0.47
    
    So we don't require a newer meson than for glib itself. See !471

 subprojects/libffi.wrap | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/subprojects/libffi.wrap b/subprojects/libffi.wrap
index 3d15e2a8a..cee484ea4 100644
--- a/subprojects/libffi.wrap
+++ b/subprojects/libffi.wrap
@@ -1,4 +1,4 @@
 [wrap-git]
 directory=libffi
 url=https://github.com/centricular/libffi.git
-revision=meson
+revision=3.2.9999