travis: Use two threads to analyze C code with SonarQube

On Nov 12, the scanner was updated and now takes a lot more time (about
3 times as much).  Using two threads reduces it a bit (by about 25%).
Using even more threads doesn't help or even increases the time again.

diff --git a/scripts/test.sh b/scripts/test.sh
index 8f573cef3b6067c9cfb53bca35cfc035d0c4999d..893dcb64991dafb4184f81f7388049508ee5d8a8 100755 (executable)
--- a/scripts/test.sh
+++ b/scripts/test.sh
@@ -284,6 +284,7 @@ sonarcloud)
                -Dsonar.projectKey=strongswan \
                -Dsonar.projectVersion=$(git describe)+${TRAVIS_BUILD_NUMBER} \
                -Dsonar.sources=. \
+               -Dsonar.cfamily.threads=2 \
                -Dsonar.cfamily.build-wrapper-output=bw-output || exit $?
        ;;
 *)