[gnome-continuous] Use Autotools for Pixman

[Emmanuele Bassi <ebassi src gnome org>]

commit 7425d7fb634bfc0fd7952a22013bf14a9829ce80
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Thu Nov 29 21:58:31 2018 +0000

    Use Autotools for Pixman
    
    The Meson build is special, and needs further testing.

 manifest.json | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/manifest.json b/manifest.json
index 948a78d..fba25e2 100644
--- a/manifest.json
+++ b/manifest.json
@@ -167,7 +167,8 @@
                  "name": "libgsystem",
                 "component": "minimal"},
 
-               {"src": "fd:pixman"},
+               {"src": "fd:pixman",
+                 "force-autotools": true},
 
                {"src": "git:git://git.sv.nongnu.org/freetype/freetype2.git",
                 "bootstrap": true,