libvpx: use bsd-compatible sed expressions

third_party/libvpx/lint_config.sh

 #!/bin/bash -e
 #
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This script is used to compare vpx_config.h and vpx_config.asm to
 # verify the two files match.
 #
 # Arguments:
@@ skipping 38 matching lines @@
 
 # Concat header file and assembly file and select those ended with 0 or 1.
 combined_config="$(cat $header_file $asm_file | grep -E ' +[01] *$')"
 
 # Extra filtering for known exceptions.
 combined_config="$(echo "$combined_config" | grep -v WIDE_REFERENCE)"
 combined_config="$(echo "$combined_config" | grep -v ARCHITECTURE)"
 combined_config="$(echo "$combined_config" | grep -v DO1STROUNDING)"
 
 # Remove all spaces.
-combined_config="$(echo "$combined_config" | sed 's/[ \t]//g')"
+combined_config="$(echo "$combined_config" | sed 's/[[:space:]]//g')"
 
 # Remove #define in the header file.
 combined_config="$(echo "$combined_config" | sed 's/.*define//')"
 
 # Remove equ in the ASM file.
 combined_config="$(echo "$combined_config" | sed 's/\.equ//')" # gas style
 combined_config="$(echo "$combined_config" | sed 's/equ//')" # rvds style
 combined_config="$(echo "$combined_config" | sed 's/\.set//')" # apple style
 
 # Remove %define in YASM ASM files.
-combined_config="$(echo "$combined_config" | sed 's/%define\s *//')" # yasm style
+combined_config="$(echo "$combined_config" | sed 's/%define[[:space:]]*//')"
 
 # Remove useless comma in gas style assembly file.
 combined_config="$(echo "$combined_config" | sed 's/,//')"
 
 # Substitute 0 with =no.
 combined_config="$(echo "$combined_config" | sed 's/0$/=no/')"
 
 # Substitute 1 with =yes.
 combined_config="$(echo "$combined_config" | sed 's/1$/=yes/')"
 
@@ skipping 22 matching lines @@
 # Do some additional filter to make libvpx happy.
 combined_config="$(echo "$combined_config" | grep -v ARCH_X86=no)"
 combined_config="$(echo "$combined_config" | grep -v ARCH_X86_64=no)"
 
 # Print out the unique configurations.
 if [ -n "$out_file" ]; then
   echo "$combined_config" | sort | uniq > $out_file
 else
   echo "$combined_config" | sort | uniq
 fi