libvpx: Pull from upstream

source/libvpx/build/make/iosbuild.sh

 #!/bin/sh
 ##
 ##  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.
 ##
 ##
 ## This script generates 'VPX.framework'. An iOS app can encode and decode VPx
 ## video by including 'VPX.framework'.
 ##
 ## Run iosbuild.sh to create 'VPX.framework' in the current directory.
 ##
 set -e
 devnull='> /dev/null 2>&1'
 
 BUILD_ROOT="_iosbuild"
 DIST_DIR="_dist"
 FRAMEWORK_DIR="VPX.framework"
 HEADER_DIR="${FRAMEWORK_DIR}/Headers/vpx"
 MAKE_JOBS=1
 LIBVPX_SOURCE_DIR=$(dirname "$0" | sed -e s,/build/make,,)
 LIPO=$(xcrun -sdk iphoneos${SDK} -find lipo)
 ORIG_PWD="$(pwd)"
 TARGETS="arm64-darwin-gcc
-         armv6-darwin-gcc
          armv7-darwin-gcc
          armv7s-darwin-gcc
          x86-iphonesimulator-gcc
          x86_64-iphonesimulator-gcc"
 
 # Configures for the target specified by $1, and invokes make with the dist
 # target using $DIST_DIR as the distribution output directory.
 build_target() {
   local target="$1"
   local old_pwd="$(pwd)"
@@ skipping 205 matching lines @@
   MAKE_JOBS=${MAKE_JOBS}
   PRESERVE_BUILD_OUTPUT=${PRESERVE_BUILD_OUTPUT}
   LIBVPX_SOURCE_DIR=${LIBVPX_SOURCE_DIR}
   LIPO=${LIPO}
   ORIG_PWD=${ORIG_PWD}
   TARGETS="${TARGETS}"
 EOF
 fi
 
 build_framework "${TARGETS}"