rpi-userland: bump to latest version

Signed-off-by: Mahyar Koshkouei <mahyar.koshkouei@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/rpi-userland/rpi-userland.hash

@@ -1,2 +1,2 @@
 # Locally computed
-sha256 46a37eaf0de598ce5804e48a5efc2120e07d753a57ed83463ebfa551562eefe6 rpi-userland-29835184aa70c13d77a11d721e934a7298bdf46a.tar.gz
+sha256 8ed745ea28ef9d5e6d2e5534acabe1ea1a6c6be9bab7f683527ce5da5a3f77cb rpi-userland-a7976021a89451de0d008aa48f16c4e88872899b.tar.gz

package/rpi-userland/rpi-userland.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-RPI_USERLAND_VERSION = 29835184aa70c13d77a11d721e934a7298bdf46a
+RPI_USERLAND_VERSION = a7976021a89451de0d008aa48f16c4e88872899b
 RPI_USERLAND_SITE = $(call github,raspberrypi,userland,$(RPI_USERLAND_VERSION))
 RPI_USERLAND_LICENSE = BSD-3-Clause
 RPI_USERLAND_LICENSE_FILES = LICENCE