* gdb.trace/collection.exp (executable): New.

	* gdb.trace/collection.exp (executable): New.
	(binfile): Use it.
	(fpreg, spreg, pcreg): New.
	(test_register): Use gdb_test_multiple.  Pass /x to print.
	(prepare_for_trace_test): New.
	(run_trace_experiment): Use "continue", not gdb_run_cmd.
	(gdb_collect_args_test, gdb_collect_argstruct_test)
	(gdb_collect_argarray_test, gdb_collect_locals_test): Use
	prepare_for_trace_test.
	(gdb_collect_registers_test): Use prepare_for_trace_test.  Use
	fpreg, spreg and pcreg.
	(gdb_collect_expression_test, gdb_collect_globals_test): Use
	prepare_for_trace_test.
	(gdb_trace_collection_test): Use fpreg, spreg and pcreg.  Don't
	try to detect tracing support here.  Don't set breakpoints at
	`begin' or `end' here.
	<global scope>: Use clean_restart.  Run to main before checking
	for tracing support.  Check for for tracing support here.