[PATCH] gdb: testsuite: fix ksh shebang to use sh

[Tom Tromey]

>>>>> "Pedro" == Pedro Alves <palves@redhat.com> writes:

Pedro> A lot of this gdb.hp/ stuff is probably all rotten beyond
Pedro> salvation, but that's another story.

Yeah, it's never run by any regular developers since all the .exp files
start:

if { ![istarget "hppa*-*-hpux*"] } {
    verbose "HPUX test ignored for non-hppa targets."
    return 0
}

Tom