modules: update OpenWrt

a8c92e9eda opkg: Fix PKG_MIRROR_HASH
844b892a74 ath10k-firmware: fix mirror hash
7e9d84ee4a opkg: update to latest Git HEAD
81f3f6540e wireguard: bump to 1.0.20200506
b956f6bd13 wireguard: bump to 20191226
c61fbdd087 odhcpd: fix PKG_SOURCE_DATE
5e8b50da15 odhcpd: fix lan host reachibility due to identical RIO and PIO prefixes (FS#3056)
ac5d5d8d09 ustream-ssl: update to 19.07 Git HEAD
a6caa8fad1 uhttpd: update to 19.07 Git HEAD
3b9e4d6d4c fstools: update to the latest version

modules

@@ -2,7 +2,7 @@ GLUON_FEEDS='packages routing gluon'
 
 OPENWRT_REPO=https://github.com/openwrt/openwrt.git
 OPENWRT_BRANCH=openwrt-19.07
-OPENWRT_COMMIT=d9244a1b5b424346f20064134680c1f0a13b46e6
+OPENWRT_COMMIT=a8c92e9eda1f9f801345255eac80bf16f65f6f4c
 
 PACKAGES_PACKAGES_REPO=https://github.com/openwrt/packages.git
 PACKAGES_PACKAGES_BRANCH=openwrt-19.07