Patch 1 of 6

Patch 1 of 6

Rework the aux vector hwcap capability checking utilities.
This is meant to consolidate a number of existing _cap
checking scripts, and allow a better way of checking for
additional capabilites.

The bugzilla for this commit is 349790

Patch submitted by 	 Will Schmidt <will_schmidt@vnet.ibm.com>
Reviewed and tested by Carl Love <cel@ibm.com>

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@15388