Check whether binutils supports TSX instructions.
Guard none/tests/amd64/tm1 accordingly.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13587 a5019735-40e9-0310-863c-91ae7b9d1cf9
Updated.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13588 a5019735-40e9-0310-863c-91ae7b9d1cf9