checkpatch.pl: add common glib defines to typelist

Otherwise it can warn this:

  ERROR: space prohibited between function name and open parenthesis '('

When with things like this:

  typedef gboolean (*it_tree_iterator)(ITValue start, ITValue end);

CC: Paolo Bonzini <pbonzini@redhat.com>
CC: "Daniel P. Berrangé" <berrange@redhat.com>
CC: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
CC: Fam Zheng <famz@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20180425070103.23723-1-peterx@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

scripts/checkpatch.pl

@@ -265,8 +265,36 @@ sub help {
 	qr{${Ident}_handler_fn},
 	qr{target_(?:u)?long},
 	qr{hwaddr},
+        # external libraries
 	qr{xml${Ident}},
 	qr{xendevicemodel_handle},
+	# Glib definitions
+	qr{gchar},
+	qr{gshort},
+	qr{glong},
+	qr{gint},
+	qr{gboolean},
+	qr{guchar},
+	qr{gushort},
+	qr{gulong},
+	qr{guint},
+	qr{gfloat},
+	qr{gdouble},
+	qr{gpointer},
+	qr{gconstpointer},
+	qr{gint8},
+	qr{guint8},
+	qr{gint16},
+	qr{guint16},
+	qr{gint32},
+	qr{guint32},
+	qr{gint64},
+	qr{guint64},
+	qr{gsize},
+	qr{gssize},
+	qr{goffset},
+	qr{gintptr},
+	qr{guintptr},
 );
 
 # This can be modified by sub possible.  Since it can be empty, be careful