tests/qapi-schema: Cover conditional arrays

Commit 967c8851 neglected to cover arrays of conditional types.  Do
that now.
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Message-Id: <20190301154051.23317-3-armbru@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

tests/qapi-schema/qapi-schema-test.json

@@ -236,5 +236,5 @@
 
 { 'event': 'TestIfEvent', 'data':
   { 'foo': 'TestIfStruct',
-    'bar': { 'type': 'TestIfEnum', 'if': 'defined(TEST_IF_EVT_BAR)' } },
+    'bar': { 'type': ['TestIfEnum'], 'if': 'defined(TEST_IF_EVT_BAR)' } },
   'if': 'defined(TEST_IF_EVT) && defined(TEST_IF_STRUCT)' }

tests/qapi-schema/qapi-schema-test.out

@@ -325,9 +325,11 @@ command TestIfCmd q_obj_TestIfCmd-arg -> UserDefThree
     if ['defined(TEST_IF_CMD)', 'defined(TEST_IF_STRUCT)']
 command TestCmdReturnDefThree None -> UserDefThree
    gen=True success_response=True boxed=False oob=False preconfig=False
+array TestIfEnumList TestIfEnum
+    if ['defined(TEST_IF_ENUM)']
 object q_obj_TestIfEvent-arg
     member foo: TestIfStruct optional=False
-    member bar: TestIfEnum optional=False
+    member bar: TestIfEnumList optional=False
         if ['defined(TEST_IF_EVT_BAR)']
     if ['defined(TEST_IF_EVT) && defined(TEST_IF_STRUCT)']
 event TestIfEvent q_obj_TestIfEvent-arg