Add libva to chromium third_party.

third_party/libva/build/gen_version.sh

+#!/bin/sh
+
+libva_topdir="$1"
+version_h_in="$2"
+
+parse_configure_ac() {
+    sed -n "/^m4_define.*${1}.*\[\([0-9]*\)\].*/s//\1/p" ${libva_topdir}/configure.ac
+}
+
+parse_configure() {
+    sed -n "/^${1}=\([0-9]*\)/s//\1/p" ${libva_topdir}/configure
+}
+
+if test -f "${libva_topdir}/configure.ac"; then
+    va_api_major_version=`parse_configure_ac va_api_major_version`
+    va_api_minor_version=`parse_configure_ac va_api_minor_version`
+    va_api_micro_version=`parse_configure_ac va_api_micro_version`
+elif test -f "${libva_topdir}/configure"; then
+    va_api_major_version=`parse_configure VA_API_MAJOR_VERSION`
+    va_api_minor_version=`parse_configure VA_API_MINOR_VERSION`
+    va_api_micro_version=`parse_configure VA_API_MICRO_VERSION`
+else
+    echo "ERROR: configure or configure.ac file not found in $libva_topdir/"
+    exit 1
+fi
+va_api_version="$va_api_major_version.$va_api_minor_version.$va_api_micro_version"
+
+sed -e "s/@VA_API_MAJOR_VERSION@/${va_api_major_version}/" \
+    -e "s/@VA_API_MINOR_VERSION@/${va_api_minor_version}/" \
+    -e "s/@VA_API_MICRO_VERSION@/${va_api_micro_version}/" \
+    -e "s/@VA_API_VERSION@/${va_api_version}/" \
+    $version_h_in