tracing: Add ftrace_trace_stack into __trace_puts/__trace_bputs

tracing: Add ftrace_trace_stack into __trace_puts/__trace_bputs

Currently trace option stacktrace is not applicable for
trace_printk with constant string argument, the reason is
in __trace_puts/__trace_bputs ftrace_trace_stack is missing.

In contrast, when using trace_printk with non constant string
argument(will call into __trace_printk/__trace_bprintk), then
trace option stacktrace is workable, this inconstant result
will confuses users a lot.

Link: http://lkml.kernel.org/p/[email protected]
Cc: [email protected] # 3.10+
Signed-off-by: zhangwei(Jovi) <[email protected]>
Signed-off-by: Steven Rostedt <[email protected]>