[PATCH obv] Changing compiler flags for MPX tests.

[Joel Brobecker]

> Adapts tests to use actual GCC flags, previous used flags were
> related to an internal GCC release.
> 
> 2015-06-18  Walfred Tedeschi  <walfred.tedeschi@intel.com>
> 
> gdb/testsuite:
> 
> 	* gdb.arch/i386-mpx-map.exp (comp_flags): Use released GCC flags.
> 	* gdb.arch/i386-mpx.exp (comp_flags): Use released GCC flags.

You labeled it as "obvious", but I'll approve anyway :)

-- 
Joel