[gnome-continuous] Tag Meson to 0.42.1

[Emmanuele Bassi <ebassi src gnome org>]

commit 34c895aff80fa2fd647b04b5d7f764d478b29ea5
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Fri Oct 6 17:54:56 2017 +0100

    Tag Meson to 0.42.1
    
    Otherwise GTK+ master won't build.

 manifest.json |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/manifest.json b/manifest.json
index 40eb7f1..3650eb6 100644
--- a/manifest.json
+++ b/manifest.json
@@ -68,7 +68,7 @@
                 "noarch": true},
 
                 {"src": "git:git://github.com/mesonbuild/meson.git",
-                 "tag": "a629642f1ecaeaef85438156e1184ac300df536a",
+                 "tag": "f5d530ef714bcbe72640a88ee8db9a041d88ce15",
                  "component": "devel",
                  "patches": ["python-meson-buildsys.patch"]},