[gjs] CI: Force python2 when configuring JHBuild

[Philip Chimento <pchimento src gnome org>]

commit 89a234fddd641f715b0cedccbe4aa1b61ec673b3
Author: Philip Chimento <philip chimento gmail com>
Date:   Fri Jul 19 17:47:41 2019 -0700

    CI: Force python2 when configuring JHBuild
    
    Fixes Docker image creation on Fedora-based images which broke between
    the last monthly run and now.
    
    Unreviewed, pushing to fix build.

 test/extra/do_environment.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/test/extra/do_environment.sh b/test/extra/do_environment.sh
index f34c5c5f..fc1d0c14 100755
--- a/test/extra/do_environment.sh
+++ b/test/extra/do_environment.sh
@@ -66,7 +66,7 @@ function do_Build_JHBuild(){
     cd /jhbuild
     git log --pretty=format:"%h %cd %s" -1
     echo
-    ./autogen.sh
+    ./autogen.sh PYTHON=$(which python2)
     make -sj2
     make install
     PATH=$PATH:~/.local/bin