[openib-general] Changes to core drivers to support RD

[Roland Dreier]

A couple of quick comments:

 - this breaks the API at least for the create QP command (since it
   adds an rdd_handle member to the marshalled struct), so the ABI
   version needs to be bumped, and compatibility code needs to be
   added to libibverbs to handle the old create QP struct.

 - It seems strange to use the abbreviation "ee" for EE contexts -- I
   think "eec" would be clearer.

Also, for some reason, your attachments got corrupted with lots of
carriage returns (^M).

 - R.