RFA: adapt gdb.threads/linux-dp.exp to remote protocol and NPTL

[Jim Blandy]

This patch is waiting for a review.

http://sources.redhat.com/ml/gdb-patches/2004-10/msg00483.html

The remote protocol doesn't announce thread creation.  NPTL has no
manager threads.  With this patch, linux-dp has no failures debugging
NPTL programs over the remote protocol.

2004-10-29  Jim Blandy  <jimb@redhat.com>

	* gdb.threads/linux-dp.exp: Tolerate the absence of "[New thread]"
	messages, and the absence of the manager thread.