build: Export TARGET_ARCH

Change-Id: I02ea0ea21dacf5c9bf1eb6b5c8b1590b84271a5b
Signed-off-by: nilac8991 <nilac8991@gmail.com>
diff --git a/tools/buildinfo.sh b/tools/buildinfo.sh
index dac3ba9..8fb70cc 100755
--- a/tools/buildinfo.sh
+++ b/tools/buildinfo.sh
@@ -63,4 +63,6 @@
 
 echo "ro.bliss.device=$BLISS_DEVICE"
 
+echo "ro.bliss.product.arch=$BLISS_TARGET_ARCH"
+
 echo "# end build properties"