contrib: Enable address-sanitize in builds

Don't enable it for binaries built with sysmocom's cross-toolchain since
it doesn't contain required libasan.

Also, don't enable it on openbsc since we don't have an enable-sanitize
flag there.

Change-Id: Ibef6c2fc497bce0d799116a854a48872f9ca16d7
diff --git a/contrib/jenkins-build-osmo-ggsn.sh b/contrib/jenkins-build-osmo-ggsn.sh
index a46c3aa..a2cf952 100755
--- a/contrib/jenkins-build-osmo-ggsn.sh
+++ b/contrib/jenkins-build-osmo-ggsn.sh
@@ -4,7 +4,7 @@
 name="osmo-ggsn"
 . "$(dirname "$0")/jenkins-build-common.sh"
 
-build_repo libosmocore --disable-doxygen
-build_repo osmo-ggsn
+build_repo libosmocore --enable-sanitize --disable-doxygen
+build_repo osmo-ggsn --enable-sanitize
 
 create_bin_tgz osmo-ggsn