fix kernel tools build.yml files to reflect correct dockerfiles

Signed-off-by: Avi Deitcher <avi@deitcher.net>

kernel/Dockerfile.bcc

@@ -1,6 +1,8 @@
 ARG BUILD_IMAGE
+ARG KERNEL_VERSION
+ARG PKG_HASH
 
-FROM ${KERNEL_VERSION}-${HASH} as ksrc
+FROM linuxkit/kernel:${KERNEL_VERSION}-${PKG_HASH} as ksrc
 
 FROM ${BUILD_IMAGE} AS build
 RUN apk update && apk upgrade -a && \

kernel/Dockerfile.perf

@@ -1,8 +1,10 @@
 # This Dockerfile extracts the source code and headers from a kernel package,
 # builds the perf utility, and places it into a scratch image
 ARG BUILD_IMAGE
+ARG KERNEL_VERSION
+ARG PKG_HASH
 
-FROM ${KERNEL_VERSION}-${HASH} AS ksrc
+FROM linuxkit/kernel:${KERNEL_VERSION}-${PKG_HASH} as ksrc
 
 FROM ${BUILD_IMAGE} AS build
 RUN apk add \

kernel/build-bcc.yml

@@ -1,2 +1,3 @@
 image: kernel-bcc
 network: true
+dockerfile: Dockerfile.bcc

kernel/build-perf.yml

@@ -1,2 +1,3 @@
 image: kernel-perf
 network: true
+dockerfile: Dockerfile.perf