trace_processor: Support uncompressed atrace data
trace_processor: Support uncompressed atrace data

Bug: https://github.com/google/perfetto/issues/49
Change-Id: I8cfedda00636deee929e1550c3cd7db24af74356

google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto