Add clang system links

Author: lolgab

.circleci/config.yml

@@ -101,6 +101,8 @@ jobs:
             curl -sL "https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x2EE0EA64E40A89B84B2DF73499E82A75642AC823" | sudo apt-key add
             sudo apt-get update
             sudo apt-get install sbt clang-8 openjdk-8-jdk
+            sudo ln -s /usr/lib/llvm-8/bin/clang /usr/bin/clang
+            sudo ln -s /usr/lib/llvm-8/bin/clang++ /usr/bin/clang++
       - sbt_cmd:
           scala_version: << parameters.scala_version >>
           sbt_tasks: xmlNative/update xmlNative/compile xmlNative/test:compile xmlNative/test xmlNative/doc xmlNative/package