Add support for various SIOCETHTOOL operations. BZ#303536.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14114 a5019735-40e9-0310-863c-91ae7b9d1cf9
Enable test cases for: rev32, rev64, saba, uaba, sabd, uabd.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14115 a5019735-40e9-0310-863c-91ae7b9d1cf9