libvpx: Pull from upstream

source/libvpx/configure

 #!/bin/bash
 ##
 ##  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 280 matching lines @@
     error_concealment
     shared
     static
     small
     postproc_visualizer
     os_support
     unit_tests
     multi_res_encoding
     temporal_denoising
     experimental
+    decrypt
     ${EXPERIMENT_LIST}
 "
 CMDLINE_SELECT="
     external_build
     extra_warnings
     werror
     install_docs
     install_bins
     install_libs
     install_srcs
@@ skipping 29 matching lines @@
     onthefly_bitpacking
     error_concealment
     shared
     static
     small
     postproc_visualizer
     unit_tests
     multi_res_encoding
     temporal_denoising
     experimental
+    decrypt
 "
 
 process_cmdline() {
     for opt do
         optval="${opt#*=}"
         case "$opt" in
         --disable-codecs) for c in ${CODECS}; do disable $c; done ;;
         --enable-?*|--disable-?*)
         eval `echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g'`
         if echo "${EXPERIMENT_LIST}" | grep "^ *$option\$" >/dev/null; then
@@ skipping 319 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