[glib] tests: Fix g_content_type_is_mime_type() test on OSX

[Patrick Griffis <pgriffis src gnome org>]

commit cbcf10411c367c873dbeb4ea029c080099322596
Author: Patrick Griffis <tingping tingping se>
Date:   Sat Apr 29 03:44:42 2017 -0400

    tests: Fix g_content_type_is_mime_type() test on OSX
    
    It should be passed a mime type not a content type.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=734946

 gio/tests/contenttype.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gio/tests/contenttype.c b/gio/tests/contenttype.c
index 4b4be46..7930002 100644
--- a/gio/tests/contenttype.c
+++ b/gio/tests/contenttype.c
@@ -144,7 +144,7 @@ test_subtype (void)
   xml = g_content_type_from_mime_type ("application/xml");
 
   g_assert (g_content_type_is_a (xml, plain));
-  g_assert (g_content_type_is_mime_type (xml, plain));
+  g_assert (g_content_type_is_mime_type (xml, "text/plain"));
 
   g_free (plain);
   g_free (xml);