qapi-introspect: modify to_qlit() to append ',' on level > 0

The following patch is going to break list entries with #if/#endif, so
they should have the trailing ',' as suffix.
Signed-off-by: NMarc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: NMarkus Armbruster <armbru@redhat.com>
Message-Id: <20180703155648.11933-8-marcandre.lureau@redhat.com>
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>

scripts/qapi/introspect.py

@@ -30,7 +30,7 @@ def to_qlit(obj, level=0, suppress_first_indent=False):
                 for elt in obj]
         elts.append(indent(level + 1) + "{}")
         ret += 'QLIT_QLIST(((QLitObject[]) {\n'
-        ret += ',\n'.join(elts) + '\n'
+        ret += '\n'.join(elts) + '\n'
         ret += indent(level) + '}))'
     elif isinstance(obj, dict):
         elts = []
@@ -45,6 +45,8 @@ def to_qlit(obj, level=0, suppress_first_indent=False):
         ret += 'QLIT_QBOOL(%s)' % ('true' if obj else 'false')
     else:
         assert False                # not implemented
+    if level > 0:
+        ret += ','
     return ret