Update glib2 to 2.42.2

Overview of changes in GLib 2.42.2
==================================

* Bugs fixed:
712570 Hang in g_threaded_socket_service_func
719455 g_file_make_directory_with_parents() can erroneously throw...
727829 win32: glibconfig.h.win32 updates
734946 Implement GContentType on OSX
741024 glist: Mention that g_list_length() is bad for checking li...
741654 [patch] gobject: don't use G_STRLOC in G_OBJECT_WARN_INVAL...
741788 Document GSettings build system integration
741807 Add thread name support on OS X and iOS
742851 avoid MSVC warnings in G_STMT_END
743508 polkitd fails to start: patch for gio/gcredentialsprivate.h
743936 handle unsigned modifier for long long in internal printf

* Translation updates:
Swedish

(prlw1)