[gnome-continuous] Bump up the version of Meson

[Emmanuele Bassi <ebassi src gnome org>]

commit 06a5bc2531684e0b65033afd7ced11b5e8685bae
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Fri Oct 19 18:31:49 2018 +0100

    Bump up the version of Meson
    
    Use 0.48.1, latest stable. Apparently 0.48.0 is buggy, and file-roller
    fails to build with Meson barfing a Python backtrace.

 manifest.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/manifest.json b/manifest.json
index 59b2ac0..fc797bf 100644
--- a/manifest.json
+++ b/manifest.json
@@ -67,7 +67,7 @@
 
                 {"src": "git:https://github.com/mesonbuild/meson.git";,
                  "name": "meson",
-                 "tag": "0.48.0",
+                 "tag": "0.48.1",
                  "component": "devel",
                  "patches": ["python-meson-buildsys.patch"]},