libvpx: Pull from upstream

source/libvpx/build/make/configure.sh

Index: source/libvpx/build/make/configure.sh
diff --git a/source/libvpx/build/make/configure.sh b/source/libvpx/build/make/configure.sh
index 907b47318de1301e32048da5626e515dea33786e..12b994963ca340d124058e6fcf81a746d5e6bb9d 100755
--- a/source/libvpx/build/make/configure.sh
+++ b/source/libvpx/build/make/configure.sh
@@ -428,7 +428,7 @@ NM=${NM}
 
 CFLAGS  = ${CFLAGS}
 CXXFLAGS  = ${CXXFLAGS}
-ARFLAGS = -rus\$(if \$(quiet),c,v)
+ARFLAGS = -crs\$(if \$(quiet),,v)
 LDFLAGS = ${LDFLAGS}
 ASFLAGS = ${ASFLAGS}
 extralibs = ${extralibs}
@@ -728,13 +728,6 @@ process_common_toolchain() {
   # Handle darwin variants. Newer SDKs allow targeting older
   # platforms, so use the newest one available.
   case ${toolchain} in
-    arm*-darwin*)
-      ios_sdk_dir="$(show_darwin_sdk_path iphoneos)"
-      if [ -d "${ios_sdk_dir}" ]; then
-        add_cflags  "-isysroot ${ios_sdk_dir}"
-        add_ldflags "-isysroot ${ios_sdk_dir}"
-      fi
-      ;;
     *-darwin*)
       osx_sdk_dir="$(show_darwin_sdk_path macosx)"
       if [ -d "${osx_sdk_dir}" ]; then
@@ -810,14 +803,7 @@ process_common_toolchain() {
           if disabled neon && enabled neon_asm; then
             die "Disabling neon while keeping neon-asm is not supported"
           fi
-          case ${toolchain} in
-            *-darwin*)
-              # Neon is guaranteed on iOS 6+ devices, while old media extensions
-              # no longer assemble with iOS 9 SDK
-              ;;
-            *)
-              soft_enable media
-          esac
+          soft_enable media
           ;;
         armv6)
           soft_enable media
@@ -1081,7 +1067,9 @@ EOF
           CROSS=${CROSS:-g}
           ;;
         os2)
+          disable_feature pic
           AS=${AS:-nasm}
+          add_ldflags -Zhigh-mem
           ;;
       esac