wireguard: bump version

Various bugfixes, including a compat fix for <= 3.10.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 6bfa6b2a046775abe90506930fd1a6aa13d02531)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/wireguard/wireguard.hash

@@ -1,4 +1,4 @@
-# From https://lists.zx2c4.com/pipermail/wireguard/2017-November/001935.html
-sha256 d9347786a9406ac276d86321ca64aadb1f0639cb0582c6e0519c634cf6e81157  WireGuard-0.0.20171111.tar.xz
+# From https://lists.zx2c4.com/pipermail/wireguard/2017-December/002200.html
+sha256 57d799d35e92c905e548d00adeb7ed1ead4d6560f084c99e5aae0a87b4eb09e4  WireGuard-0.0.20171211.tar.xz
 # Locally calculated
 sha256 8177f97513213526df2cf6184d8ff986c675afb514d4e68a404010521b880643  COPYING

package/wireguard/wireguard.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-WIREGUARD_VERSION = 0.0.20171111
+WIREGUARD_VERSION = 0.0.20171211
 WIREGUARD_SITE = https://git.zx2c4.com/WireGuard/snapshot
 WIREGUARD_SOURCE = WireGuard-$(WIREGUARD_VERSION).tar.xz
 WIREGUARD_LICENSE = GPL-2.0