Revert "dtbhtool: Add LOCAL_MODULE_TAGS := optional"

Superflous commit, see:
http://source.android.com/source/add-device.html.

This reverts commit 7598a16084a6aa1f708bea3c6448f824f73db851.

Change-Id: I75af8b68b8dc07a27d1bc2bf23550f3c1c8ddb77
2 files changed