rs6000: Add -mdejagnu-cpu=
This adds an option -mdejagnu-cpu=. This option simply overrides what
is given in -mcpu=. The reason for this is that with older versions
of DejaGnu the value given in the RUNTESTFLAGS will override the value
a testcase wants to have.
* config/rs6000/rs6000.c (rs6000_option_override_internal): If
rs6000_dejagnu_cpu_index is set, use that to override rs6000_cpu_index.
* config/rs6000/rs6000.opt (mdejagnu-cpu=): New option.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@269322
138bc75d-0d04-0410-961f-
82ee72b054a4