[Bug other/48093] -mtls-dialect= is undocumented

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48093

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> 2011-04-29 13:29:48 
UTC ---
There are no -mtls-dialect=gnu2 runtime testcases anywhere either.
We have no idea if it works at all.