Fix bugs and make improvements

- Get clone() working on FreeBSD
- Increase some Python build quotas
- Add more atomic builtins to chibicc
- Fix ASAN poisoning of alloca() memory
- Make MODE= mandatory link path tinier
- Improve the examples folder a little bit
- Start working on some more resource limits
- Make the linenoise auto-complete UI as good as GNU readline
- Update compile.com, avoiding AVX codegen on non-AVX systems
- Make sure empty path to syscalls like opendir raises ENOENT
- Correctly polyfill ENOENT vs. ENOTDIR on the New Technology
- Port bestline's paredit features to //third_party/linenoise
- Remove workarounds for RHEL 5.0 bugs that were fixed in 5.1

libc/nt/kernel32/CreateSymbolicLinkW.s

@@ -2,11 +2,11 @@
 .imp	kernel32,__imp_CreateSymbolicLinkW,CreateSymbolicLinkW,0
 
 	.text.windows
-CreateSymbolicLink:
+__CreateSymbolicLink:
 	push	%rbp
 	mov	%rsp,%rbp
 	.profilable
 	mov	__imp_CreateSymbolicLinkW(%rip),%rax
 	jmp	__sysv2nt
-	.endfn	CreateSymbolicLink,globl
+	.endfn	__CreateSymbolicLink,globl
 	.previous

libc/nt/kernel32/MoveFileExW.s

@@ -2,11 +2,11 @@
 .imp	kernel32,__imp_MoveFileExW,MoveFileExW,0
 
 	.text.windows
-MoveFileEx:
+__MoveFileEx:
 	push	%rbp
 	mov	%rsp,%rbp
 	.profilable
 	mov	__imp_MoveFileExW(%rip),%rax
 	jmp	__sysv2nt
-	.endfn	MoveFileEx,globl
+	.endfn	__MoveFileEx,globl
 	.previous

libc/nt/kernel32/TlsAlloc.s

@@ -1,2 +1,14 @@
 .include "o/libc/nt/codegen.inc"
 .imp	kernel32,__imp_TlsAlloc,TlsAlloc,0
+
+	.text.windows
+__TlsAlloc:
+	push	%rbp
+	mov	%rsp,%rbp
+	.profilable
+	sub	$32,%rsp
+	call	*__imp_TlsAlloc(%rip)
+	leave
+	ret
+	.endfn	__TlsAlloc,globl
+	.previous

libc/nt/kernel32/TlsFree.s

@@ -1,2 +1,15 @@
 .include "o/libc/nt/codegen.inc"
 .imp	kernel32,__imp_TlsFree,TlsFree,0
+
+	.text.windows
+__TlsFree:
+	push	%rbp
+	mov	%rsp,%rbp
+	.profilable
+	mov	%rdi,%rcx
+	sub	$32,%rsp
+	call	*__imp_TlsFree(%rip)
+	leave
+	ret
+	.endfn	__TlsFree,globl
+	.previous

libc/nt/kernel32/TlsGetValue.s

@@ -1,2 +1,15 @@
 .include "o/libc/nt/codegen.inc"
 .imp	kernel32,__imp_TlsGetValue,TlsGetValue,0
+
+	.text.windows
+__TlsGetValue:
+	push	%rbp
+	mov	%rsp,%rbp
+	.profilable
+	mov	%rdi,%rcx
+	sub	$32,%rsp
+	call	*__imp_TlsGetValue(%rip)
+	leave
+	ret
+	.endfn	__TlsGetValue,globl
+	.previous

libc/nt/kernel32/TlsSetValue.s

@@ -1,2 +1,12 @@
 .include "o/libc/nt/codegen.inc"
 .imp	kernel32,__imp_TlsSetValue,TlsSetValue,0
+
+	.text.windows
+__TlsSetValue:
+	push	%rbp
+	mov	%rsp,%rbp
+	.profilable
+	mov	__imp_TlsSetValue(%rip),%rax
+	jmp	__sysv2nt
+	.endfn	__TlsSetValue,globl
+	.previous