busybox: fix build with ndk r23

Compiler and tool names need to be updated in Makefile.

Also fix some patch offsets while we are at it

packages/busybox/0000-use-clang.patch

@@ -1,12 +1,23 @@
-diff -uNr busybox-1.31.1/Makefile busybox-1.31.1.mod/Makefile
---- busybox-1.31.1/Makefile	2019-10-25 11:44:52.000000000 +0300
-+++ busybox-1.31.1.mod/Makefile	2019-11-11 22:19:06.004778909 +0200
-@@ -289,7 +289,7 @@
+--- ./Makefile.orig	2021-08-19 16:48:15.223628163 +0200
++++ ./Makefile	2021-08-19 16:47:29.456942514 +0200
+@@ -289,14 +289,14 @@
  # Make variables (CC, etc...)
 
  AS		= $(CROSS_COMPILE)as
 -CC		= $(CROSS_COMPILE)gcc
 +CC		= $(CROSS_COMPILE)clang
  LD		= $(CC) -nostdlib
  CPP		= $(CC) -E
- AR		= $(CROSS_COMPILE)ar
+-AR		= $(CROSS_COMPILE)ar
+-NM		= $(CROSS_COMPILE)nm
+-STRIP		= $(CROSS_COMPILE)strip
+-OBJCOPY		= $(CROSS_COMPILE)objcopy
+-OBJDUMP		= $(CROSS_COMPILE)objdump
++AR		= llvm-ar
++NM		= llvm-nm
++STRIP		= llvm-strip
++OBJCOPY		= llvm-objcopy
++OBJDUMP		= llvm-objdump
+ PKG_CONFIG	?= $(CROSS_COMPILE)pkg-config
+ AWK		= awk
+ GENKSYMS	= scripts/genksyms/genksyms

packages/busybox/0004-Makefile.flags.patch

@@ -1,6 +1,6 @@
---- ../Makefile.flags.orig	2020-07-20 19:17:12.263392471 +0000
-+++ ./Makefile.flags	2020-07-20 19:17:22.988106865 +0000
-@@ -150,9 +150,9 @@
+--- ./Makefile.flags.orig	2021-01-01 11:52:27.000000000 +0100
++++ ./Makefile.flags	2021-08-19 16:49:06.743647568 +0200
+@@ -151,9 +151,9 @@
  # fall back to using a temp file:
  CRYPT_AVAILABLE := $(shell echo 'int main(void){return 0;}' >crypttest.c; $(CC) $(CFLAGS) -lcrypt -o /dev/null crypttest.c >/dev/null 2>&1 && echo "y"; rm crypttest.c)
  ifeq ($(CRYPT_AVAILABLE),y)

packages/busybox/0009-networking-ftpd-no-chroot.patch → packages/busybox/0008-networking-ftpd-no-chroot.patch

@@ -1,7 +1,6 @@
-diff -uNr busybox-1.31.1/networking/ftpd.c busybox-1.31.1.mod/networking/ftpd.c
---- busybox-1.31.1/networking/ftpd.c	2019-06-10 13:50:53.000000000 +0300
-+++ busybox-1.31.1.mod/networking/ftpd.c	2019-11-11 22:26:50.216912741 +0200
-@@ -1301,8 +1301,11 @@
+--- ./networking/ftpd.c.orig	2021-08-19 16:49:06.730314230 +0200
++++ ./networking/ftpd.c	2021-08-19 16:49:06.753647572 +0200
+@@ -1302,8 +1302,11 @@
  		G.root_fd = xopen("/", O_RDONLY | O_DIRECTORY);
  		close_on_exec_on(G.root_fd);
  #endif

packages/busybox/0010-networking-httpd-default-port.patch → packages/busybox/0009-networking-httpd-default-port.patch

@@ -1,7 +1,6 @@
-diff -uNr busybox-1.31.1/networking/httpd.c busybox-1.31.1.mod/networking/httpd.c
---- busybox-1.31.1/networking/httpd.c	2019-11-11 21:31:58.406733857 +0200
-+++ busybox-1.31.1.mod/networking/httpd.c	2019-11-11 22:29:16.534250966 +0200
-@@ -232,7 +232,7 @@
+--- ./networking/httpd.c.orig	2021-08-19 16:49:06.730314230 +0200
++++ ./networking/httpd.c	2021-08-19 16:49:06.756980906 +0200
+@@ -270,7 +270,7 @@
  //usage:     "\n	-i		Inetd mode"
  //usage:     "\n	-f		Don't daemonize"
  //usage:     "\n	-v[v]		Verbose"
@@ -10,16 +9,16 @@ diff -uNr busybox-1.31.1/networking/httpd.c busybox-1.31.1.mod/networking/httpd.
  //usage:	IF_FEATURE_HTTPD_SETUID(
  //usage:     "\n	-u USER[:GRP]	Set uid/gid after binding to port")
  //usage:	IF_FEATURE_HTTPD_BASIC_AUTH(
-@@ -488,7 +488,7 @@
- 	asm volatile("":::"memory"); \
+@@ -538,7 +538,7 @@
+ 	SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
  	IF_FEATURE_HTTPD_BASIC_AUTH(g_realm = "Web Server Authentication";) \
  	IF_FEATURE_HTTPD_RANGES(range_start = -1;) \
 -	bind_addr_or_port = "80"; \
 +	bind_addr_or_port = "8080"; \
  	index_page = index_html; \
  	file_size = -1; \
  } while (0)
-@@ -1004,7 +1004,7 @@
+@@ -1030,7 +1030,7 @@
  	if (!errno && n && n <= 0xffff)
  		n = create_and_bind_stream_or_die(NULL, n);
  	else
@@ -28,7 +27,7 @@ diff -uNr busybox-1.31.1/networking/httpd.c busybox-1.31.1.mod/networking/httpd.
  	xlisten(n, 9);
  	return n;
  }
-@@ -2209,7 +2209,7 @@
+@@ -2279,7 +2279,7 @@
  		if (proxy_entry) {
  			if (verbose > 1)
  				bb_error_msg("proxy:%s", urlcopy);

packages/busybox/0011-networking-tftp-no-chroot.patch

@@ -0,0 +1,15 @@
+--- ./networking/tftp.c.orig	2021-01-01 11:52:27.000000000 +0100
++++ ./networking/tftp.c	2021-08-19 16:49:06.763647575 +0200
+@@ -917,7 +917,12 @@
+ 		G.pw = xgetpwnam(user_opt);
+ 	}
+ 	if (argv[0]) {
++#ifdef __ANDROID__
++		// chroot may trigger seccomp and is allowed only for root anyway.
++		xchdir(argv[0]);
++#else
+ 		xchroot(argv[0]);
++#endif
+ 	}
+
+ 	result = recv_from_to(STDIN_FILENO,