We've had this patch to fix various failures in gdb.xml/tdesc-regs.exp 
in our local tree for a few years now and would like to get it committed 
upstream.  It fixes these problems:

- It's using the wrong source pathname when trying to copy the .xml file 
to remote host.

- We've seen at least one case where the type of the 32-bit register 
prints as "int32_t" rather than "int|long" etc -- I think this was on an 
ilp64 target.

- This test expects to see a register group named "general" but not all 
targets provide one.

OK to commit?

-Sandra