Hello,

This is the gdb_mbuild.sh, as committed.  It is simplier than the 
previous version as I've stripped out the parallel build (just leaving 
parallel make) code.

I've one (possibly two) follow on patches.

- separate out the configure (RichardE's old code) so that it can be 
done in parallel (yes? no?)

- massage the output from `maint print architecture' so that it is 
easier to diff it.

Andrew