Patch to enable a fully working gdb for GNU/Hurd

[Tom Tromey]

>>>>> "Svante" == Svante Signell <svante.signell@telia.com> writes:

Svante> 2) When debugging an executable gdb does not find the debugging symbols
Svante> for libraries. For example with libc0.3-dbg installed, the symbols are
Svante> found with 7.2 but not with 7.3.50 when running the built gdb directly
Svante> on an executable having debugging symbols (they are found).

If libc0.3-dbg is just the separate debuginfo package, then make sure
you have configured gdb with the correct --with-separate-debug-dir.

Tom