Include a copy of the oct612x Octasic echo canceller interface to be used
by astribank_hexload to load the echo canceller firmware to a Xorcom
Astribank.
git-svn-id: http://svn.astersk.org/svn/dahdi/tools/trunk@10030 17933a7a-c749-41c5-a318-cba88f637d49