rtl8821au: bump to latest

We add -Wno-error to not error out on warnings, which would otherwise
cause build failures.

Signed-off-by: Christian Stewart <christian@paral.in>
[Thomas: as suggested by Baruch, use -Wno-error instead of disabling
specific warnings.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/rtl8821au/rtl8821au.hash

@@ -1,2 +1,2 @@
 # Locally calculated
-sha256 6e4334b0718b2ac611bf8b4d7a493b016bdb1c24daa7b459f091b92b6fd961c7  rtl8821au-c33ddb05a77741d2a9c9b974ad0cf0fa26d17b6e.tar.gz
+sha256 23889fe4bf518dbadcbfac613f64a74bbce177267d9337a98843e4e7de8f1896  rtl8821au-b018b446fb0729fa659e7eead475d6c13f192642.tar.gz

package/rtl8821au/rtl8821au.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-RTL8821AU_VERSION = c33ddb05a77741d2a9c9b974ad0cf0fa26d17b6e
+RTL8821AU_VERSION = b018b446fb0729fa659e7eead475d6c13f192642
 RTL8821AU_SITE = $(call github,abperiasamy,rtl8812AU_8821AU_linux,$(RTL8821AU_VERSION))
 RTL8821AU_LICENSE = GPL-2.0
 RTL8821AU_LICENSE_FILES = COPYING
@@ -12,7 +12,8 @@ RTL8821AU_LICENSE_FILES = COPYING
 RTL8821AU_MODULE_MAKE_OPTS = \
 	CONFIG_RTL8812AU_8821AU=m \
 	KVER=$(LINUX_VERSION_PROBED) \
-	USER_EXTRA_CFLAGS=-DCONFIG_$(call qstrip,$(BR2_ENDIAN))_ENDIAN
+	USER_EXTRA_CFLAGS="-DCONFIG_$(call qstrip,$(BR2_ENDIAN))_ENDIAN \
+		-Wno-error"
 
 $(eval $(kernel-module))
 $(eval $(generic-package))