gitlab-ci: add scons llvm 3.5 build

Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>

.travis.yml

@@ -530,28 +530,6 @@ matrix:
             - libunwind8-dev
             - python3-pip
             - python3-setuptools
-    - env:
-        - LABEL="scons LLVM"
-        - BUILD=scons
-        - SCONSFLAGS="-j4"
-        - SCONS_TARGET="llvm=1"
-        # Keep it symmetrical to the make build.
-        - SCONS_CHECK_COMMAND="scons llvm=1 check"
-        - LLVM_VERSION=3.5
-        - LLVM_CONFIG="llvm-config-${LLVM_VERSION}"
-      addons:
-        apt:
-          packages:
-            # LLVM packaging is broken and misses these dependencies
-            - libedit-dev
-            # We actually want to test against llvm-3.3, yet 3.5 is available
-            - llvm-3.5-dev
-            # Common
-            - xz-utils
-            - x11proto-xf86vidmode-dev
-            - libexpat1-dev
-            - libx11-xcb-dev
-            - libelf-dev
     - env:
         - LABEL="scons SWR"
         - BUILD=scons