Update build file(s) to work with autobuild-metadata (1.3)

autobuild.xml

@@ -120,12 +120,12 @@
           <string>windows</string>
         </map>
       </map>
-      <key>version</key>
-      <string>1.2.2-1.3.2</string>
+      <key>version_file</key>
+      <string>VERSION.txt</string>
     </map>
     <key>type</key>
     <string>autobuild</string>
     <key>version</key>
-    <string>1.2</string>
+    <string>1.3</string>
   </map>
 </llsd>

build-cmd.sh

@@ -26,6 +26,10 @@ eval "$("$AUTOBUILD" source_environment)"
 top="$(pwd)"
 stage="$(pwd)/stage"
 
+
+build=${AUTOBUILD_BUILD_ID:=0}
+echo "${OGG_VERSION}-${VORBIS_VERSION}.${build}" > "${stage}/VERSION.txt"
+
 case "$AUTOBUILD_PLATFORM" in
     "windows")
         pushd "$OGG_SOURCE_DIR"