Add new facility to have multiple active codenames.

Use this to have both L and KKWT.

Change-Id: I78cd5ed2dcffab9e93030184ba6f9eb9a6a3cba5
diff --git a/tools/buildinfo.sh b/tools/buildinfo.sh
index b402fac..593e5b5 100755
--- a/tools/buildinfo.sh
+++ b/tools/buildinfo.sh
@@ -8,6 +8,7 @@
 echo "ro.build.version.incremental=$BUILD_NUMBER"
 echo "ro.build.version.sdk=$PLATFORM_SDK_VERSION"
 echo "ro.build.version.codename=$PLATFORM_VERSION_CODENAME"
+echo "ro.build.version.all_codenames=$PLATFORM_VERSION_ALL_CODENAMES"
 echo "ro.build.version.release=$PLATFORM_VERSION"
 echo "ro.build.date=`date`"
 echo "ro.build.date.utc=`date +%s`"