Get Cosmopolitan into releasable state

A new rollup tool now exists for flattening out the headers in a way
that works better for our purposes than cpp. A lot of the API clutter
has been removed. APIs that aren't a sure thing in terms of general
recommendation are now marked internal.

There's now a smoke test for the amalgamation archive and gigantic
header file. So we can now guarantee you can use this project on the
easiest difficulty setting without the gigantic repository.

A website is being created, which is currently a work in progress:
https://justine.storage.googleapis.com/cosmopolitan/index.html

libc/sysv/g_syscount.S

@@ -46,8 +46,8 @@ syscount:
 	.previous
 
 	.init.start 701,_init_g_syscount
-	mov	systemfive(%rip),%rax
+	mov	__systemfive(%rip),%rax
 	stosq
 	ezlea	syscount,ax
-	mov	%rax,systemfive(%rip)
+	mov	%rax,__systemfive(%rip)
 	.init.end 701,_init_g_syscount

libc/sysv/macros.h

@@ -1,22 +1,3 @@
-/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8     -*-│
-│vi: set et ft=asm ts=8 tw=8 fenc=utf-8                                     :vi│
-╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
-│                                                                              │
-│ This program is free software; you can redistribute it and/or modify         │
-│ it under the terms of the GNU General Public License as published by         │
-│ the Free Software Foundation; version 2 of the License.                      │
-│                                                                              │
-│ This program is distributed in the hope that it will be useful, but          │
-│ WITHOUT ANY WARRANTY; without even the implied warranty of                   │
-│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU             │
-│ General Public License for more details.                                     │
-│                                                                              │
-│ You should have received a copy of the GNU General Public License            │
-│ along with this program; if not, write to the Free Software                  │
-│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA                │
-│ 02110-1301 USA                                                               │
-╚─────────────────────────────────────────────────────────────────────────────*/
 #ifndef COSMOPOLITAN_LIBC_SYSV_MACROS_H_
 #define COSMOPOLITAN_LIBC_SYSV_MACROS_H_
 #ifdef __ASSEMBLER__
@@ -38,13 +19,13 @@
   .ifnb	\kw2
 	.align	16
 \name:	movabs	$\num,%rax
-	jmp	*systemfive(%rip)
+	jmp	*__systemfive(%rip)
   .else
 \name:	push	%rbp
 	mov	%rsp,%rbp
 	movabs	$\num,%rax
 	.hookable
-	call	*systemfive(%rip)
+	call	*__systemfive(%rip)
 	pop	%rbp
 	ret
   .endif

libc/sysv/syscall.S

@@ -40,5 +40,5 @@ syscall:mov	%rdi,%rax
 	mov	%r8,%rcx		# ← intended
 	mov	%r9,%r8
 	mov	8(%rsp),%r9
-	jmp	*systemfive(%rip)
+	jmp	*__systemfive(%rip)
 	.endfn	syscall,globl

libc/sysv/systemfive.S

@@ -84,11 +84,12 @@
 /	@clob	%rcx,%r10,%r11
 /	@see	syscalls.sh
 	.initbss 300,_init_systemfive
-hostos:	.quad	0
-	.endobj	hostos,globl,hidden
-systemfive:
+__hostos:
 	.quad	0
-	.endobj	systemfive,globl,hidden
+	.endobj	__hostos,globl,hidden
+__systemfive:
+	.quad	0
+	.endobj	__systemfive,globl,hidden
 	.previous
 .Lanchorpoint:
 systemfive.linux:
@@ -211,10 +212,10 @@ systemfive.init.xnu:
 systemfive.init.os:
 	ezlea	.Lanchorpoint,cx
 	pop	%rax
-	stosq	#→ hostos
+	stosq	#→ __hostos
 	pop	%rax
 	add	%rcx,%rax
-	stosq	#→ systemfive
+	stosq	#→ __systemfive
 	push	%rdi
 	ezlea	syscon.start,di
 	ezlea	syscon.end,bx