Patch from acmay: http://bugs.uclibc.org/view.php?id=50

0000050: gdb_server and gdb_client fixes and split

Here is a patch with 2 issues.

gdbserver does not depend on ncurses (just the full gdb needs it)

Split out gdb client config option, to be separate from gdbserver.  If you
build gdb client for the host once it does not need to be rebuilt when the rest
of libs change. So I build it and save it off.