Switch to new PPC repository and run Clang on PPC

.travis.yml

@@ -26,15 +26,24 @@ matrix:
             - python3
             - python3-yaml
             - valgrind
-    - name: "Run tests on qemu-ppc"
+    - name: "Run tests on qemu-ppc (GCC)"
       os: linux
       services: docker
       env:
         - MAKETARGET="run-functest-all run-testvectors-all run-sanitizer-all run-symbol-namespace-all"
-      script:  # TODO: should we do this in a Dockerfile instead?
+      script:
         - docker run --rm --privileged multiarch/qemu-user-static:register --reset
-        - docker run --rm -v `pwd`:`pwd` -w `pwd` "twiggers/debian-sid-powerpc" /bin/bash -c "uname -a &&
+        - docker run --rm -v `pwd`:`pwd` -w `pwd` "pqclean/debian-unstable-ppc" /bin/bash -c "uname -a &&
           make ${MAKETARGET}"
+    - name: "Run tests on qemu-ppc (Clang)"
+      os: linux
+      services: docker
+      env:
+        - MAKETARGET="run-functest-all run-testvectors-all run-sanitizer-all run-symbol-namespace-all"
+      script:
+        - docker run --rm --privileged multiarch/qemu-user-static:register --reset
+        - docker run --rm -v `pwd`:`pwd` -w `pwd` "pqclean/debian-unstable-ppc" /bin/bash -c "uname -a &&
+          make CC=clang ${MAKETARGET}"
     - name: "MacOS + Clang"
       os: osx
       osx_image: xcode10.1