Remove the notion of "sys*"

- This idea originates from very early in the project and was, at the
  time, a very easy way to categorise things.
- Now, it doesn't really make much sense - it is fairly arbitary, often
  occuring when there is a change in kernel, but not from builder-hex0
  to fiwix, and sysb is in reality completely unnecessary.
- In short, the sys* stuff is a bit of a mess that makes the project
  more difficult to understand.
- This puts everything down into one folder and has a manifest file that
  is used to generate the build scripts on the fly rather than using
  coded scripts.
- This is created in the "seed" stage.

stage0-posix -- (calls) --> seed -- (generates) --> main steps

Alongside this change there are a variety of other smaller fixups to the
general structure of the live-bootstrap rootfs.

- Creating a rootfs has become much simpler and is defined as code in
  go.sh. The new structure, for an about-to-be booted system, is

/
-- /steps (direct copy of steps/)
-- /distfiles (direct copy of distfiles/)
-- all files from seed/*
-- all files from seed/stage0-posix/*

- There is no longer such a thing as /usr/include/musl, this didn't
  really make any sense, as musl is the final libc used. Rather, to
  separate musl and mes, we have /usr/include/mes, which is much easier
  to work with.
- This also makes mes easier to blow away later.
- A few things that weren't properly in packages have been changed;
  checksum-transcriber, simple-patch, kexec-fiwix have all been given
  fully qualified package names.
- Highly breaking change, scripts now exist in their package directory
  but NOT WITH THE packagename.sh. Rather, they use pass1.sh, pass2.sh,
  etc. This avoids manual definition of passes.
  - Ditto with patches; default directory is patches, but then any patch
    series specific to a pass are named patches-passX.

steps/bison-3.4.1/files/config.h

@@ -0,0 +1,40 @@
+// SPDX-FileCopyrightText: 2020 Andrius Štikonas <andrius@stikonas.eu>
+// SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#define HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME 1
+#define HAVE_DECL_STRERROR_R 1
+#define HAVE_GETTIMEOFDAY 1
+#define HAVE_PIPE 1
+#define HAVE_SNPRINTF 1
+#define HAVE_STDINT_H 1
+#define HAVE_UNISTD_H 1
+#define M4 "/usr/bin/m4"
+#define M4_GNU_OPTION ""
+#define PACKAGE "bison"
+#define PACKAGE_BUGREPORT "bug-bison@gnu.org"
+#define PACKAGE_COPYRIGHT_YEAR 2019
+#define PACKAGE_NAME "GNU Bison"
+#define PACKAGE_STRING "GNU Bison 3.4.1"
+#define PACKAGE_URL "http://www.gnu.org/software/bison/"
+#define PACKAGE_VERSION "3.4.1"
+#define VERSION "3.4.1"
+#define PROMOTED_MODE_T mode_t
+#define BOURNE_SHELL "/bin/sh"
+#define _GNU_SOURCE 1
+#define _Noreturn
+#define _GL_ASYNC_SAFE
+#define _GL_EXTERN_INLINE extern inline
+#define _GL_INLINE_HEADER_BEGIN
+#define _GL_INLINE_HEADER_END
+#define _GL_UNUSED
+#define _GL_UNUSED_LABEL
+#define _GL_ATTRIBUTE_PURE
+#define _GL_ATTRIBUTE_CONST
+#define _GL_ATTRIBUTE_MALLOC
+#define _GL_ATTRIBUTE_FORMAT_PRINTF(x, y)
+#define _GL_ARG_NONNULL(x)
+#ifndef _GL_INLINE
+#define _GL_INLINE static inline
+#endif