orc: bump version

And add hash file.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/orc/orc.hash

@@ -0,0 +1,2 @@
+# From http://lists.freedesktop.org/archives/gstreamer-devel/2014-December/050855.html
+sha256	767eaebce2941737b43368225ec54598b3055ca78b4dc50c4092f5fcdc0bdfe7  orc-0.4.23.tar.xz

package/orc/orc.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-ORC_VERSION = 0.4.22
+ORC_VERSION = 0.4.23
 ORC_SOURCE = orc-$(ORC_VERSION).tar.xz
 ORC_SITE = http://gstreamer.freedesktop.org/data/src/orc
 ORC_LICENSE = BSD-2c, BSD-3c