modules: update OpenWrt

3e81365141e4 kernel: gen_stats: Fix netlink stats dumping in the presence of padding
dd1f97b37d41 ramips: clean up and fix MT7621 NAND driver issues
68f40d7ecc4c mt76: update to the latest version
16a9ddfe64e2 ramips: ethernet: use own page_frag_cache
0e6cfb691914 ramips: ethernet: use skb_free_frag to free fragments

modules

@@ -2,7 +2,7 @@ GLUON_FEEDS='packages routing luci gluon'
 
 OPENWRT_REPO=https://git.openwrt.org/openwrt/openwrt.git
 OPENWRT_BRANCH=openwrt-18.06
-OPENWRT_COMMIT=514a4b3e1b4e42fa796d1c908259ee9e215a77da
+OPENWRT_COMMIT=3e81365141e4626522c616e7870d246594eff26d
 
 PACKAGES_PACKAGES_REPO=https://github.com/openwrt/packages.git
 PACKAGES_PACKAGES_BRANCH=openwrt-18.06