perf probe: Accept multiple filter options

Accept multiple filter options. Each filters are combined by logical-or.
E.g. --filter abc* --filter *def is same as --filter abc*|*def

Signed-off-by: Masami Hiramatsu <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

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