Use blokaslabs apt for rt kernel

stage3/00-configure-apt/00-run.sh

@@ -0,0 +1,8 @@
+#!/bin/bash -e
+
+install -m 644 files/blokas.list ${ROOTFS_DIR}/etc/apt/sources.list.d/
+
+on_chroot apt-key add - < files/blokas.gpg.key
+on_chroot << EOF
+apt-get update
+EOF

stage3/00-configure-apt/files/blokas.gpg.key

@@ -0,0 +1,30 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+Version: GnuPG v1
+
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+60OKbyUQt+HJx8s+7Yw4lXYaLZqJ0e7tDW4WQxqqVc9fm7Vm
+=7IOz
+-----END PGP PUBLIC KEY BLOCK-----

stage3/00-configure-apt/files/blokas.list

@@ -0,0 +1 @@
+deb http://apt.blokas.io/ rpi main

stage3/02-install-rt-kernel/01-run.sh

@@ -1,9 +0,0 @@
-#!/bin/bash -e
-
-wget https://github.com/BlokasLabs/rpi-kernel-rt/archive/${RT_KERNEL_VERSION}.tar.gz -O /tmp/${RT_KERNEL_VERSION}.tar.gz
-
-# Remove regular kernel modules.
-rm -r ${ROOTFS_DIR}/lib/modules/*
-
-tar -xvf /tmp/${RT_KERNEL_VERSION}.tar.gz --strip 1 -C ${ROOTFS_DIR}/
-rm /tmp/${RT_KERNEL_VERSION}.tar.gz

stage3/03-install-rt-kernel/00-packages

@@ -0,0 +1,2 @@
+raspberrypi-kernel-rt
+