libvpx: Pull from upstream

source/libvpx/build/make/msvs_common.sh

 #!/bin/bash
 ##
 ##  Copyright (c) 2014 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.
 ##
 
 if [ "$(uname -o 2>/dev/null)" = "Cygwin" ] \
    && cygpath --help >/dev/null 2>&1; then
     FIXPATH='cygpath -m'
 else
-    FIXPATH='echo'
+    FIXPATH='echo_path'
 fi
 
 die() {
     echo "${self_basename}: $@" >&2
     exit 1
 }
 
 die_unknown(){
     echo "Unknown option \"$1\"." >&2
     echo "See ${self_basename} --help for available options." >&2
     exit 1
 }
 
+echo_path() {
+    for path; do
+        echo "$path"
+    done
+}
+
+# Output one, possibly changed based on the system, path per line.
 fix_path() {
-    $FIXPATH "$1"
+    $FIXPATH "$@"
+}
+
+# Corrects the paths in file_list in one pass for efficiency.
+fix_file_list() {
+    # TODO(jzern): this could be more generic and take the array as a param.
+    files=$(fix_path "${file_list[@]}")
+    local IFS=$'\n'
+    file_list=($files)
 }
 
 generate_uuid() {
     local hex="0123456789ABCDEF"
     local i
     local uuid=""
     local j
     #93995380-89BD-4b04-88EB-625FBE52EBFB
     for ((i=0; i<32; i++)); do
         (( j = $RANDOM % 16 ))
@@ skipping 47 matching lines @@
         echo "${indent}<${tag}"
         indent_push
         tag_attributes "$@"
         indent_pop
         echo "${indent}/>"
     else
         echo "${indent}<${tag}/>"
     fi
 }