Another prereq for n-api on a compute node

* work around n-api on a compute node pulling in glance without running
  through the glance prereqs

Change-Id: I400c555dd5c04d52bf8aa415747769374a145390
diff --git a/files/apts/n-api b/files/apts/n-api
index 0f08daa..ad943ff 100644
--- a/files/apts/n-api
+++ b/files/apts/n-api
@@ -1 +1,2 @@
+gcc  # temporary because this pulls in glance to get the client without running the glance prereqs
 python-dateutil