libglib2: bump to 2.28.6

The patch libglib2-mkenums-nowarn.patch is removed, since it has been
merged upstream.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libglib2/libglib2-mkenums-nowarn.patch

@@ -1,14 +0,0 @@
----
- gobject/glib-mkenums.in |    2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-Index: glib-2.26.0/gobject/glib-mkenums.in
-===================================================================
---- glib-2.26.0.orig/gobject/glib-mkenums.in
-+++ glib-2.26.0/gobject/glib-mkenums.in
-@@ -1,4 +1,4 @@
--#!@PERL_PATH@ -w
-+#!@PERL_PATH@
- 
- use File::Basename;
- use Safe;

package/libglib2/libglib2.mk

@@ -3,8 +3,8 @@
 # libglib2
 #
 #############################################################
-LIBGLIB2_VERSION_MAJOR = 2.26
-LIBGLIB2_VERSION_MINOR = 1
+LIBGLIB2_VERSION_MAJOR = 2.28
+LIBGLIB2_VERSION_MINOR = 6
 LIBGLIB2_VERSION = $(LIBGLIB2_VERSION_MAJOR).$(LIBGLIB2_VERSION_MINOR)
 LIBGLIB2_SOURCE = glib-$(LIBGLIB2_VERSION).tar.bz2
 LIBGLIB2_SITE = http://ftp.gnome.org/pub/gnome/sources/glib/$(LIBGLIB2_VERSION_MAJOR)