Fix -list-thread-groups --available logic and add test

New in v3:

- Replace use_gdb_stub with can_spawn_for_attach.
- Call kill_wait_spawned_process on spawn_ids.

Commit

  Use std::set in mi-main.c
  52f9abe4c739f42cc5f80b2629276493ac6306f9

changed the logic of the "-list-thread-groups --available" by mistake
when a pid is passed.  It prints all the processes except the one
specified by the given pid.  The correct behavior is to only print the
process corresponding to that pid.  this patch fixes that and adds a test.

gdb/ChangeLog:

	* mi/mi-main.c (list_available_thread_groups): Reverse filter logic.

gdb/testsuite/ChangeLog:

	* gdb.mi/list-thread-groups-available.exp: New file.
	* gdb.mi/list-thread-groups-available.c: New file.

1 files changed, 1 insertions, 1 deletions

diff --git a/gdb/mi/mi-main.c b/gdb/mi/mi-main.c
index 83b1fcf532..289445f832 100644
--- a/gdb/mi/mi-main.c
+++ b/gdb/mi/mi-main.c
@@ -801,7 +801,7 @@ list_available_thread_groups (const std::set<int> &ids, int recurse)
       /* At present, the target will return all available processes
 	 and if information about specific ones was required, we filter
 	 undesired processes here.  */
-      if (!ids.empty () && ids.find (pid_i) != ids.end ())
+      if (!ids.empty () && ids.find (pid_i) == ids.end ())
 	continue;
 
       ui_out_emit_tuple tuple_emitter (uiout, NULL);