travis: use xenial LLVM package for scan-build

MarcelRaad · MarcelRaad · commit cf1ec70e7215 · 2019-06-09T13:20:57.000+02:00
I missed that in commit 99a49d6.
diff --git a/.travis.yml b/.travis.yml
@@ -340,7 +340,7 @@ matrix:
               apt:
                   sources:
                       - *common_sources
-                      - llvm-toolchain-trusty-7
+                      - llvm-toolchain-xenial-7
                   packages:
                       - *common_packages
                       - clang-7
