build-system: jenkins build script support for 1.4.x

Refs #55550

Change-Id: Ifd7ba05ee9801623563d7c2d6b583a4565c68877

tools/build-system/hudson-sflphone-script.sh

@@ -114,6 +114,7 @@ function launch_functional_test_daemon {
 }
 
 function build_contrib {
+    if [ -d contrib ] ; then
         pushd contrib
         mkdir -p native
         pushd native
@@ -122,6 +123,11 @@ function build_contrib {
         make list
         make
         popd
+    else
+        # We're on 1.4.x
+        pushd libs
+        ./compile_pjsip.sh
+    fi
     popd
 }