unittest: add conner test case for YamiParser::NalReader
unittest: add conner test case for YamiParser::NalReader

getPos is complex when we have epb, if we do not reach the epb,
the getPos does not need to include it.this commit will expose the following issue.
We will fix it late

[ RUN      ] NalReaderTest.GetPosForEPB
nalReader_unittest.cpp:97: Failure
      Expected: 1u
      Which is: 1
To be equal to: r.getPos()
      Which is: 9
nalReader_unittest.cpp:100: Failure
      Expected: 8u
      Which is: 8
To be equal to: r.getPos()
      Which is: 16
[  FAILED  ] NalReaderTest.GetPosForEPB (0 ms)

01org/libyami,01org/libyami,01org/libyami