perf hists browser: Show message for percent limit

Like the stdio, it should show messages about omitted hierarchy entries.
Please refer the previous commit for more details.

As it needs to check an entry is omitted or not multiple times, add the
has_no_entry field in the hist entry.

Suggested-and-Tested-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: Namhyung Kim <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Wang Nan <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

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