wireguard: bump to version 0.0.20180420

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 062dcceed0ba0d2b1929597ad9b0393dbdb21628)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/wireguard/wireguard.hash

@@ -1,4 +1,4 @@
-# From https://lists.zx2c4.com/pipermail/wireguard/2018-March/002446.html
-sha256 efb1652f0da67fb2731040439b6abb820a5e2f1bc177aa15c5dce68ea3327787  WireGuard-0.0.20180304.tar.xz
+# From https://lists.zx2c4.com/pipermail/wireguard/2018-April/002697.html
+sha256 b58cd2acf9e8d3fe9044c06c0056bd74da1f5673a456f011d36eee3f6fb1da16  WireGuard-0.0.20180420.tar.xz
 # Locally calculated
 sha256 8177f97513213526df2cf6184d8ff986c675afb514d4e68a404010521b880643  COPYING

package/wireguard/wireguard.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-WIREGUARD_VERSION = 0.0.20180304
+WIREGUARD_VERSION = 0.0.20180420
 WIREGUARD_SITE = https://git.zx2c4.com/WireGuard/snapshot
 WIREGUARD_SOURCE = WireGuard-$(WIREGUARD_VERSION).tar.xz
 WIREGUARD_LICENSE = GPL-2.0