[gnome-build-meta] .gitlab-ci.yml: Use current buildstream version from git

[Javier Jardón Cabezas <jjardon src gnome org>]

commit 9471066de96ceab635e1e97496d7855fa6511a58
Author: Javier Jardón <jjardon gnome org>
Date:   Sat Feb 24 18:59:23 2018 +0000

    .gitlab-ci.yml: Use current buildstream version from git
    
    To support the new features to customize bst shell environment,
    introduced in
    commit cbe402f8daff2dd6f67ec5e214452094a894ce1a

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e17a3a4..b28f52f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -6,7 +6,7 @@ variables:
   XDG_CACHE_HOME: "${CI_PROJECT_DIR}/cache"
   GET_SOURCES_ATTEMPTS: 3
   BST: 'bst --colors'
-  BST_SHA: '2643b095c59db6e8cbc2b8620c2ad820c7a5636d' #  1.1.0
+  BST_SHA: '9632eafb970cab601cc647b4df05f92518882d25' #  1.1.0-30-g9632eaf
 
 stages:
   - build