Use correct generator class for glib2

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>

tools/keymap-gen

diff --git a/tools/keymap-gen b/tools/keymap-gen
index 92f6b71..5dc7d3d 100755
--- a/tools/keymap-gen
+++ b/tools/keymap-gen
@@ -471,7 +471,7 @@
 
 GENERATORS = {
     "stdc": StdCLanguageGenerator(),
-    "glib2": StdCLanguageGenerator(),
+    "glib2": GLib2LanguageGenerator(),
     "python2": PythonLanguageGenerator(),
     "python3": PythonLanguageGenerator(),
     "perl": PerlLanguageGenerator(),