Revert "configure: enable -Wshorten-64-to-32 for hbd"

This reverts commit a8b97eb5133c3dd20739ea59db2e46ed571d122a.

Reason for revert: There are still a few warnings related to this in 
the base configuration. Reverting this to avoid breaking new patches.

Change-Id: Ifdff76683cdd4b7476fcc9fbf4ab1736c112770c