Upgrade kernel to 4.14.341-openela

This is a continuation of the 4.14 series by the Open Enterprise Linux
Alliance, ostensibly to the same maintenance standards as the now
discontinued kernel.org LTS.

This code is primarily offered as a Git repository, with gz tarballs
also available, but no xz versions. Switching back to a gzipped version
of the kernel source code would introduce too much srcfs growth, so we
use the last kernel.org tar.xz release (4.14.336), and apply OpenELA's
changes using a patch generated from the Git repository.

steps/linux-4.14.336/patches/remove-kconfig.patch

@@ -1,23 +0,0 @@
-SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
-
-SPDX-License-Identifier: GPL-2.0-only
-
-kconfig uses gperf, which we don't have at this stage. We manually generate
-everything (in the actual script) that is actually required within kconfig,
-and forgo everything that is not really required for the build.
-
---- Makefile	2021-07-30 21:25:43.577592065 +1000
-+++ Makefile	2021-07-30 21:26:40.349015612 +1000
-@@ -547,10 +547,10 @@
- export KBUILD_DEFCONFIG KBUILD_KCONFIG
- 
- config: scripts_basic outputmakefile FORCE
--	$(Q)$(MAKE) $(build)=scripts/kconfig $@
-+	$(Q)true
-
- %config: scripts_basic outputmakefile FORCE
--	$(Q)$(MAKE) $(build)=scripts/kconfig $@
-+	true
-
- else
- # ===========================================================================