contrib: jenkins.sh: Disable doxygen in libosmocore build

Change-Id: I12d995c0c993483ed940fc173904d6e686fbe0ab
diff --git a/contrib/jenkins.sh b/contrib/jenkins.sh
index c739f7f..617aeac 100755
--- a/contrib/jenkins.sh
+++ b/contrib/jenkins.sh
@@ -16,7 +16,7 @@
 export PKG_CONFIG_PATH="$inst/lib/pkgconfig:$PKG_CONFIG_PATH"
 export LD_LIBRARY_PATH="$inst/lib"
 
-osmo-build-dep.sh libosmocore
+osmo-build-dep.sh libosmocore "" --disable-doxygen
 osmo-build-dep.sh libosmo-abis
 osmo-build-dep.sh libosmo-netif
 osmo-build-dep.sh libosmo-sccp