Update .gitignore

.gitignore

@@ -36,6 +36,14 @@ xmldocs.make
 examples/glib-print
 docs/reference/gi-decl-list.txt
 docs/reference/gi-decl.txt
+docs/reference/gi-undeclared.txt
+docs/reference/gi-undocumented.txt
+docs/reference/gi-unused.txt
+docs/reference/gi.args
+docs/reference/gi.hierarchy
+docs/reference/gi.interfaces
+docs/reference/gi.prerequisites
+docs/reference/gi.signals
 docs/reference/html
 docs/reference/xml
 docs/reference/tmpl