Fix weak symbols to work in tcc.

Fixes #322.

steps/tcc-0.9.27/patches-pass5/ignore-static-inside-array.patch

@@ -1 +0,0 @@
-../patches/ignore-static-inside-array.patch

steps/tcc-0.9.27/patches-pass5/static-link.patch

@@ -1 +0,0 @@
-../patches/static-link.patch

steps/tcc-0.9.27/patches/dont-skip-weak-symbols-ar.patch

@@ -0,0 +1,50 @@
+SPDX-FileCopyrightText: 2021 Alexander Sosedkin <monk@unboiled.info>
+
+SPDX-License-Identifier: LGPL-2.0-or-later
+
+From da11cf651576f94486dbd043dbfcde469e497574 Mon Sep 17 00:00:00 2001
+From: Alexander Sosedkin <monk@unboiled.info>
+Date: Sat, 30 Oct 2021 16:04:11 +0200
+Subject: [PATCH] Don't skip weak symbols during ar creation
+
+```
+$ echo 'int __attribute__((__weak__)) f(void) { return 4; }' > w.c
+$ tcc -c w.c -o w.o
+
+$ tcc-old -ar rc w.a w.o; nm -s w.a  # previous behaviour, not indexed
+w.o:
+0000000000000000 W f
+
+$ ar rc w.a w.o; nm -s w.a           # GNU binutils behaviour, indexed
+Archive index:
+f in w.o
+
+0000000000000000 W f
+
+$ tcc-new rc w.a w.o; nm -s w.a      # new behaviour, indexed
+Archive index:
+f in w.o
+
+0000000000000000 W f
+```
+---
+ tcctools.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/tcctools.c b/tcctools.c
+index cf174965..4567b81a 100644
+--- tcctools.c
++++ tcctools.c
+@@ -200,6 +200,9 @@ ST_FUNC int tcc_tool_ar(TCCState *s1, int argc, char **argv)
+                     (sym->st_info == 0x10
+                     || sym->st_info == 0x11
+                     || sym->st_info == 0x12
++                    || sym->st_info == 0x20
++                    || sym->st_info == 0x21
++                    || sym->st_info == 0x22
+                     )) {
+                     //printf("symtab: %2Xh %4Xh %2Xh %s\n", sym->st_info, sym->st_size, sym->st_shndx, strtab + sym->st_name);
+                     istrlen = strlen(strtab + sym->st_name)+1;
+-- 
+2.11.4.GIT
+

steps/tcc-0.9.27/patches/ignore-duplicate-symbols.patch

@@ -1,19 +0,0 @@
-SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
-
-SPDX-License-Identifier: LGPL-2.0-or-later
-
-Ignore duplicate symbols. Due to poor support for weak symbols in tcc-ar
-we had to patch musl to replace weak symbols with strong symbols
---- tccelf.c	2021-02-02 17:41:08.662247892 +0000
-+++ tccelf.c	2021-02-02 23:21:49.652080201 +0000
-@@ -552,8 +552,9 @@
- #if 0
-                 printf("new_bind=%x new_shndx=%x new_vis=%x old_bind=%x old_shndx=%x old_vis=%x\n",
-                        sym_bind, shndx, new_vis, esym_bind, esym->st_shndx, esym_vis);
--#endif
-                 tcc_error_noabort("'%s' defined twice", name);
-+#endif
-+                goto do_patch;
-             }
-         } else {
-         do_patch: