libvpx: Pull from upstream

source/libvpx/build/make/obj_int_extract.c

 /*
  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 303 matching lines @@
     ENDIAN_ASSIGN_IN_PLACE(hdr64->sh_info);
     ENDIAN_ASSIGN_IN_PLACE(hdr64->sh_addralign);
     ENDIAN_ASSIGN_IN_PLACE(hdr64->sh_entsize);
   }
 
   return 0;
 bail:
   return 1;
 }
 
-char *parse_elf_string_table(elf_obj_t *elf, int s_idx, int idx) {
+const char *parse_elf_string_table(elf_obj_t *elf, int s_idx, int idx) {
   if (elf->bits == 32) {
     Elf32_Shdr shdr;
 
     if (parse_elf_section(elf, s_idx, &shdr, NULL)) {
       log_msg("Failed to parse ELF string table: section %d, index %d\n",
               s_idx, idx);
       return "";
     }
 
     return (char *)(elf->buf + shdr.sh_offset + idx);
@@ skipping 483 matching lines @@
 #endif
 
   free(file_buf);
 
   if (!res)
     return EXIT_SUCCESS;
 
 bail:
   return EXIT_FAILURE;
 }