update multibuild and test with xenial images

Author: mattip

.travis.yml

@@ -51,35 +51,40 @@ matrix:
       env:
         - PLAT=aarch64
         - MB_ML_VER=2014
-    # causes a segfault
-    # - os: linux
-    #  arch: arm64
-    #  env:
-    #    - PLAT=aarch64
-    #    - INTERFACE64=1
-    #    - MB_ML_VER=2014
+        - DOCKER_TEST_IMAGE=multibuild/xenial_{PLAT}
+    - os: linux
+      arch: arm64
+      env:
+        - PLAT=aarch64
+        - INTERFACE64=1
+        - MB_ML_VER=2014
+        - DOCKER_TEST_IMAGE=multibuild/xenial_{PLAT}
     - os: linux
       arch: s390x
       env:
         - PLAT=s390x
         - MB_ML_VER=2014
+        - DOCKER_TEST_IMAGE=multibuild/xenial_{PLAT}
     - os: linux
       arch: s390x
       env:
         - PLAT=s390x
         - INTERFACE64=1
         - MB_ML_VER=2014
+        - DOCKER_TEST_IMAGE=multibuild/xenial_{PLAT}
     - os: linux
       arch: ppc64le
       env:
         - PLAT=ppc64le
         - MB_ML_VER=2014
+        - DOCKER_TEST_IMAGE=multibuild/xenial_{PLAT}
     - os: linux
       arch: ppc64le
       env:
         - PLAT=ppc64le
         - INTERFACE64=1
         - MB_ML_VER=2014
+        - DOCKER_TEST_IMAGE=multibuild/xenial_{PLAT}
     # linux manylinux2010
     - os: linux
       env: