[gnome-continuous] Force Autotools build for Mesa

[Emmanuele Bassi <ebassi src gnome org>]

commit e03d1df4f2c005a9f49323230ea5f1a1e50d42ac
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Mar 6 17:45:36 2018 +0700

    Force Autotools build for Mesa
    
    We're not ready to use Meson by default, yet.

 manifest.json |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/manifest.json b/manifest.json
index cebbbd8..f8d5cdf 100644
--- a/manifest.json
+++ b/manifest.json
@@ -323,6 +323,7 @@
                  },
                  "patches": ["mesa-nv50-fix-build.patch",
                             "mesa-llvm-config-dir.patch"],
+                 "force-autotools": true,
                  "config-opts": [
                      "--host=x86_64-gnomeostree-linux",
                      "--disable-asm",