tracing: Remove stray tab in TRACE_EVAL_MAP_FILE's help text

tracing: Remove stray tab in TRACE_EVAL_MAP_FILE's help text

There was a stray tab in the help text of the aforementioned config
option which showed like this:

  The "print fmt" of the trace events will show the enum/sizeof names
  instead        of their values. This can cause problems for user space tools
  ...

in menuconfig. Remove it and end a sentence with a fullstop.

No functional changes.

Link: http://lkml.kernel.org/r/20191112174219.10933-1-bp@alien8.de
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>