Fix argument to compiled_cond, and add cases for compiled-condition.

Fix argument to compiled_cond, and add cases for compiled-condition.

This patch fixes the argument passed to compiled_cond.  It should be
regs buffer instead of tracepoint_hit_ctx.  Test case is added as
well for testing compiled-cond.

gdb/gdbserver/ChangeLog

2015-09-16  Wei-cheng Wang  <cole945@gmail.com>

	* tracepoint.c (eval_result_type): Change prototype.
	(condition_true_at_tracepoint): Fix argument to compiled_cond.

gdb/testsuite/ChangeLog

2015-09-16  Wei-cheng Wang  <cole945@gmail.com>

	* gdb.trace/ftrace.exp: (test_ftrace_condition) New function
	for testing bytecode compilation.