[Bug target/59952] -march=core-avx2 should not enable RTM

[thiago at kde dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59952

--- Comment #12 from Thiago Macieira <thiago at kde dot org> ---
GCC 4.9.0 got released with -march=haswell still enabling RTM and HLE, even
though there are Haswell parts without TSX.