glibmm: bump version to 2.56.0

Also add hashes for the license files.

Signed-off-by: Adam Duskett <aduskett@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/glibmm/glibmm.hash

@@ -1,2 +1,5 @@
-# From http://ftp.gnome.org/pub/GNOME/sources/glibmm/2.54/glibmm-2.54.1.sha256sum
-sha256	7cc28c732b04d70ed34f0c923543129083cfb90580ea4a2b4be5b38802bf6a4a glibmm-2.54.1.tar.xz
+# From http://ftp.gnome.org/pub/GNOME/sources/glibmm/2.56/glibmm-2.56.0.sha256sum
+sha256	6e74fcba0d245451c58fc8a196e9d103789bc510e1eee1a9b1e816c5209e79a9 glibmm-2.56.0.tar.xz
+# License files, locally calculated
+sha256	3ea7fa7c5d9a3a113e950eca9cfb85107f096270d8e4dd99daa9d8abdebc60e7 COPYING
+sha256	ab15fd526bd8dd18a9e77ebc139656bf4d33e97fc7238cd11bf60e2b9b8666c6 COPYING.tools

package/glibmm/glibmm.mk

@@ -4,8 +4,8 @@
 #
 ################################################################################
 
-GLIBMM_VERSION_MAJOR = 2.54
-GLIBMM_VERSION = $(GLIBMM_VERSION_MAJOR).1
+GLIBMM_VERSION_MAJOR = 2.56
+GLIBMM_VERSION = $(GLIBMM_VERSION_MAJOR).0
 GLIBMM_LICENSE = LGPL-2.1+ (library), GPL-2.0+ (tools)
 GLIBMM_LICENSE_FILES = COPYING COPYING.tools
 GLIBMM_SOURCE = glibmm-$(GLIBMM_VERSION).tar.xz