[gjs] CI: g-ir-scanner build fails with rawhile's clang

[Philip Chimento <pchimento src gnome org>]

commit c449e13bfc4f435373eec7638822a0e10cdb73c3
Author: Claudio André <claudioandre br gmail com>
Date:   Mon Feb 5 14:12:50 2018 -0200

    CI: g-ir-scanner build fails with rawhile's clang
    
    The g-ir-scanner build is failing with clang 6, passing unknown
    arguments -mcet and -fcf-protection.

 .gitlab-ci.yml | 25 ++++++++++++-------------
 1 file changed, 12 insertions(+), 13 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2a97fd7f..d84c9158 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -75,19 +75,18 @@ fedora_gcc:
     DEV: devel
     BUILD_OPTS: "--enable-ubsan"
 
-# Temporarily disabled: "unknown arguments -mcet and -fcf-protection"
-# fedora_clang:
-#   <<: *build
-#   stage: build
-#   image: claudioandre/spidermonkey:fedora.dev.gcc
-#   variables:
-#     BASE: fedora
-#     OS: fedora.dev.gcc
-#     CC: clang
-#     DEV: devel
-#     BUILD_OPTS: "--enable-ubsan"
-#   except:
-#     - /^wip\/.*/
+fedora_clang:
+  <<: *build
+  stage: build
+  image: claudioandre/spidermonkey:job-342.4  # temporarily pinned to old tag
+  variables:
+    BASE: fedora
+    OS: fedora.dev.gcc
+    CC: clang
+    DEV: devel
+    BUILD_OPTS: "--enable-ubsan"
+  except:
+    - /^wip\/.*/
 
 coverage:
   <<: *build