kernel: Update alpine to latest

Signed-off-by: Rolf Neugebauer <rn@rneugeba.io>

kernel/Dockerfile

@@ -1,4 +1,4 @@
-FROM linuxkit/alpine:518c2ed0f398c5508969ac5e033607201fb419ed AS kernel-build
+FROM linuxkit/alpine:86cd4f51b49fb9a078b50201d892a3c7973d48ec AS kernel-build
 RUN apk add \
     argp-standalone \
     automake \

kernel/Dockerfile.bcc

@@ -1,7 +1,7 @@
 ARG IMAGE
 FROM ${IMAGE} as ksrc
 
-FROM linuxkit/alpine:518c2ed0f398c5508969ac5e033607201fb419ed AS build
+FROM linuxkit/alpine:86cd4f51b49fb9a078b50201d892a3c7973d48ec AS build
 RUN apk update && apk upgrade -a && \
   apk add --no-cache \
   argp-standalone \
@@ -103,7 +103,7 @@ RUN mkdir -p /out/usr/bin && \
 RUN mkdir -p /out/usr/local/share/ && \
     cp -a /usr/local/share/lua /out/usr/local/share/
 
-FROM linuxkit/alpine:518c2ed0f398c5508969ac5e033607201fb419ed as mirror
+FROM linuxkit/alpine:86cd4f51b49fb9a078b50201d892a3c7973d48ec as mirror
 RUN mkdir -p /out/etc/apk && cp -r /etc/apk/* /out/etc/apk/
 RUN apk update && apk upgrade -a && \
   apk add --no-cache --initdb -p /out \

kernel/Dockerfile.kconfig

@@ -1,4 +1,4 @@
-FROM linuxkit/alpine:518c2ed0f398c5508969ac5e033607201fb419ed AS kernel-build
+FROM linuxkit/alpine:86cd4f51b49fb9a078b50201d892a3c7973d48ec AS kernel-build
 RUN apk add \
     argp-standalone \
     bison \

kernel/Dockerfile.perf

@@ -3,7 +3,7 @@
 ARG IMAGE
 FROM ${IMAGE} AS ksrc
 
-FROM linuxkit/alpine:518c2ed0f398c5508969ac5e033607201fb419ed AS build
+FROM linuxkit/alpine:86cd4f51b49fb9a078b50201d892a3c7973d48ec AS build
 RUN apk add \
     argp-standalone \
     bash \

kernel/Dockerfile.zfs

@@ -1,6 +1,6 @@
 ARG IMAGE
 FROM ${IMAGE} AS ksrc
-FROM linuxkit/alpine:518c2ed0f398c5508969ac5e033607201fb419ed AS build
+FROM linuxkit/alpine:86cd4f51b49fb9a078b50201d892a3c7973d48ec AS build
 RUN apk add \
     attr-dev \
     autoconf \