When switching the thread from the processor, store %dr7 content into the pcb before disabling watchpoints. Otherwise, when the thread is restored on a processor, watchpoints are still disabled.
When switching the thread from the processor, store %dr7 content
into the pcb before disabling watchpoints. Otherwise, when the
thread is restored on a processor, watchpoints are still disabled.

Submitted by:	Tijl Coosemans <tijl coosemans org>
	(I would be much happier if Tijl commited this himself)
MFC after:	1 week

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