[binutils-gdb] btrace: resume all requested threads

[sergiodj+buildbot at redhat dot com]

*** TEST RESULTS FOR COMMIT 0ca912dfef6289f9d2cd7d70b7ec80883a9b4395 ***

Author: Markus Metzger <markus.t.metzger@intel.com>
Branch: master
Commit: 0ca912dfef6289f9d2cd7d70b7ec80883a9b4395

btrace: resume all requested threads

The record targets are implicitly schedlocked.  They only step the current
thread and keep other threads where they are.

Change record btrace to step all requested threads in to_resume.

For maintenance and debugging, we keep the old behaviour when the target below
is not non-stop.  Enable with "maint set target-non-stop on".

gdb/
	* record-btrace.c (record_btrace_resume_thread): A move request
	overwrites a previous move request.
	(record_btrace_find_resume_thread): Removed.
	(record_btrace_resume): Resume all requested threads.