Include gerrit.war in api_{install,deploy}

This patch adds gerrit.war into api_{install,deploy} buck build step.
This allows third party maven based builds depend on gerrit.war
artifact.

Change-Id: I22c8d3339a1647913967e423e45462c2c5c255de
Signed-off-by: Dariusz Luksza <dariusz@luksza.org>
diff --git a/tools/maven/package.defs b/tools/maven/package.defs
index 7306031..7fd227a 100644
--- a/tools/maven/package.defs
+++ b/tools/maven/package.defs
@@ -17,11 +17,12 @@
     repository = None,
     url = None,
     jar = {},
-    src = {}):
+    src = {},
+    war = {}):
   cmd = ['$(exe //tools/maven:mvn)', '-v', version, '-o', '$OUT']
   dep = []
 
-  for type,d in [('jar', jar), ('java-source', src)]:
+  for type,d in [('jar', jar), ('java-source', src), ('war', war)]:
     for a,t in d.iteritems():
       cmd.append('-s %s:%s:$(location %s)' % (a,type,t))
       dep.append(t)