Enable sanitize for CI tests

Change-Id: I112307b5eaf494062b2e8498ff2e9217fb8db925
diff --git a/contrib/jenkins.sh b/contrib/jenkins.sh
index b273517..eaf4f2b 100755
--- a/contrib/jenkins.sh
+++ b/contrib/jenkins.sh
@@ -36,7 +36,7 @@
 
 cd "$base"
 autoreconf --install --force
-./configure --enable-external-tests CFLAGS="-Werror" CPPFLAGS="-Werror"
+./configure --enable-sanitize --enable-external-tests CFLAGS="-Werror" CPPFLAGS="-Werror"
 $MAKE $PARALLEL_MAKE
 $MAKE check || cat-testlogs.sh
 $MAKE distcheck || cat-testlogs.sh