libvpx: Pull from upstream

source/libvpx/configure

 #!/bin/sh
 ##
 ##  configure
 ##
 ##  This script is the front-end to the build system. It provides a similar
 ##  interface to standard configure scripts with some extra bits for dealing
 ##  with toolchains that differ from the standard POSIX interface and
 ##  for extracting subsets of the source tree. In theory, reusable parts
 ##  of this script were intended to live in build/make/configure.sh,
 ##  but in practice, the line is pretty blurry.
@@ skipping 171 matching lines @@
     doxy_patch=${doxy_version##*.}
 
     [ $doxy_major -gt 1 ] && enable_feature doxygen
     [ $doxy_minor -gt 5 ] && enable_feature doxygen
     [ $doxy_minor -eq 5 ] && [ $doxy_patch -ge 3 ] && enable_feature doxygen
 fi
 
 # install everything except the sources, by default. sources will have
 # to be enabled when doing dist builds, since that's no longer a common
 # case.
-enabled doxygen && php -v >/dev/null 2>&1 && enable_feature install_docs
+enabled doxygen && enable_feature install_docs
 enable_feature install_bins
 enable_feature install_libs
 
 enable_feature static
 enable_feature optimizations
 enable_feature fast_unaligned #allow unaligned accesses, if supported by hw
 enable_feature spatial_resampling
 enable_feature multithread
 enable_feature os_support
 enable_feature temporal_denoising
@@ skipping 29 matching lines @@
     mips
     x86
     x86_64
     ppc32
     ppc64
 "
 ARCH_EXT_LIST="
     edsp
     media
     neon
+    neon_asm
 
     mips32
     dspr2
 
     mmx
     sse
     sse2
     sse3
     ssse3
     sse4_1
@@ skipping 492 matching lines @@
 ##
 ## END APPLICATION SPECIFIC CONFIGURATION
 ##
 CONFIGURE_ARGS="$@"
 process "$@"
 print_webm_license ${BUILD_PFX}vpx_config.c "/*" " */"
 cat <<EOF >> ${BUILD_PFX}vpx_config.c
 static const char* const cfg = "$CONFIGURE_ARGS";
 const char *vpx_codec_build_config(void) {return cfg;}
 EOF