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/tcc-0.9.27/simple-patches/addback-fileopen.after

@@ -0,0 +1,7 @@
+    if ((fh = fopen(argv[i_lib], "wb")) == NULL)
+    {
+        fprintf(stderr, "tcc: ar: can't open file %s \n", argv[i_lib]);
+        goto the_end;
+    }
+
+    // write header

steps/tcc-0.9.27/simple-patches/addback-fileopen.before

@@ -0,0 +1 @@
+    // write header

steps/tcc-0.9.27/simple-patches/check-reloc-null.after

@@ -0,0 +1,6 @@
+static void fill_local_got_entries(TCCState *s1)
+{
+    ElfW_Rel *rel;
+    if (!s1->got->reloc)
+	return;
+    for_each_elem(s1->got->reloc, 0, rel, ElfW_Rel) {

steps/tcc-0.9.27/simple-patches/check-reloc-null.before

@@ -0,0 +1,4 @@
+static void fill_local_got_entries(TCCState *s1)
+{
+    ElfW_Rel *rel;
+    for_each_elem(s1->got->reloc, 0, rel, ElfW_Rel) {

steps/tcc-0.9.27/simple-patches/fiwix-paddr.after

@@ -0,0 +1,3 @@
+                        ph->p_paddr = ph->p_vaddr;
+                        if (ph->p_paddr >= 0xC0000000)
+                            ph->p_paddr = ph->p_paddr - 0xC0000000;

steps/tcc-0.9.27/simple-patches/fiwix-paddr.before

@@ -0,0 +1 @@
+                        ph->p_paddr = ph->p_vaddr;

steps/tcc-0.9.27/simple-patches/remove-fileopen.after

@@ -0,0 +1,2 @@
+    if (ret == 1)
+        return ar_usage(ret);

steps/tcc-0.9.27/simple-patches/remove-fileopen.before

@@ -0,0 +1,8 @@
+    if (ret == 1)
+        return ar_usage(ret);
+
+    if ((fh = fopen(argv[i_lib], "wb")) == NULL)
+    {
+        fprintf(stderr, "tcc: ar: can't open file %s \n", argv[i_lib]);
+        goto the_end;
+    }