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/bash-2.05b/mk/common.mk

@@ -0,0 +1,59 @@
+# SPDX-FileCopyrightText: 2021 Paul Dersey <pdersey@gmail.com>
+# SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+CC      = tcc
+LD      = tcc
+AR      = tcc -ar
+
+COMMON_CFLAGS  = \
+	-DHAVE_DIRENT_H \
+	-DSTRUCT_DIRENT_HAS_D_INO \
+	-DHAVE_STDINT_H \
+	-DHAVE_LIMITS_H \
+	-DHAVE_STRING_H \
+	-DHAVE_INTTYPES_H \
+	-DRETSIGTYPE=void \
+	-DHUGE_VAL=10000000000.0 \
+	-DTERMIO_TTY_DRIVER \
+	-DPREFER_STDARG \
+	-DHAVE_DECL_STRTOL \
+	-DHAVE_DECL_STRTOLL \
+	-DHAVE_DECL_STRTOUL \
+	-DHAVE_DECL_STRTOULL \
+	-DHAVE_TZNAME \
+	-DPIPESIZE=4096 \
+	-DDEFAULT_PATH_VALUE=\"$(prefix)/bin\" \
+	-DSTANDARD_UTILS_PATH=\"$(prefix)/bin\" \
+	-DPPROMPT=\"$ \" \
+	-DSPROMPT=\"$ \" \
+	-DCONF_MACHTYPE=\"bootstrap\" \
+	-DGETGROUPS_T=int \
+	-DCOND_COMMAND \
+	-DCONF_HOSTTYPE=\"i386\" \
+	-DCONF_OSTYPE=\"linux\" \
+	-DDEFAULT_MAIL_DIRECTORY=\"/fake-mail\" \
+	-DVOID_SIGHANDLER \
+	-DDISTVERSION=\"2.05b\" \
+	-DBUILDVERSION=\"0\" \
+	-DSCCSVERSION=\"2.05b\" \
+	-DLC_ALL=\"C\" \
+	-DHAVE_STRERROR \
+	-DHAVE_MEMSET \
+	-DHAVE_DUP2 \
+	-DHAVE_STRTOUL \
+	-DHAVE_STRTOULL \
+	-DHAVE_STRCHR \
+	-DHAVE_BCOPY \
+	-DHAVE_BZERO \
+	-DHAVE_POSIX_SIGNALS \
+	-DHAVE_GETCWD \
+	-DHAVE_SYS_SIGLIST \
+	-Dendpwent\(x\)=0 \
+	-Denable_hostname_completion\(on_or_off\)=0
+
+BUILTINS_DEF_FILES = alias bind break builtin cd colon command complete declare \
+	echo enable eval exec exit fc fg_bg hash history jobs kill let read return \
+	set setattr shift source suspend test times trap type ulimit umask wait \
+	getopts pushd shopt printf