Install typings for XOS GUI tests

Change-Id: I400bcab6a3041a0440015907a4cea0e845d658a3
diff --git a/jjb/cord/cord-xos-gui-unit.sh b/jjb/cord/cord-xos-gui-unit.sh
index 55f46d8..0bfadaa 100644
--- a/jjb/cord/cord-xos-gui-unit.sh
+++ b/jjb/cord/cord-xos-gui-unit.sh
@@ -2,6 +2,7 @@
 
 # Install npm deps
 npm install
+npm install typings --global
 typings install
 
 # Check code style