[patch]: testsuite: run bash instead of sh when using brace expansion

[Joel Brobecker]

> I think I have an assignment for gdb, but I'm not 100 percent sure.
> I've moved recently and don't find my papers at the moment.
> Could someone verify please that the assignment is in place?

I confirm I found you in the FSF records (all of binutils and GDB).

-- 
Joel