Ping Re: e500 port: the port itself

[Joseph S. Myers]

To clarify things for reviewers: the bulk of the patch is new files only 
used for e500.  If you're concerned with classic hard-float, you need only 
satisfy yourself that sysdeps/powerpc/preconfigure won't affect you.  For 
classic soft-float, you need only check the changes to 
sysdeps/powerpc/nofpu/soft-supp.h, sysdeps/powerpc/soft-fp/sfp-machine.h 
and sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/nptl/localplt.data as 
well as the preconfigure script.  Everything else is in e500-specific 
files.

Although the port benefits from the six listed kernel changes, it doesn't 
depend on them; you can use it with an unpatched kernel and will just get 
noisier libm test results because of kernel bugs.

-- 
Joseph S. Myers
joseph@codesourcery.com