Set ro.build.characteristics to the value from PRODUCT_CHARACTERISTICS that's also passed to aapt.

Bug: 3144768
Change-Id: Ic1724c64d015de7a5c4f13709b91db51b8f10872
diff --git a/tools/buildinfo.sh b/tools/buildinfo.sh
index ce3ee81..e3fe99c 100755
--- a/tools/buildinfo.sh
+++ b/tools/buildinfo.sh
@@ -40,5 +40,6 @@
 echo "# Do not try to parse ro.build.description or .fingerprint"
 echo "ro.build.description=$PRIVATE_BUILD_DESC"
 echo "ro.build.fingerprint=$BUILD_FINGERPRINT"
+echo "ro.build.characteristics=$TARGET_AAPT_CHARACTERISTICS"
 
 echo "# end build properties"