Fix the buffer problem

Sometimes STAR will complain due to some crazy multimappers:

EXITING because of fatal error: buffer size for SAM output is too small
Solution: increase input parameter --limitOutSAMoneReadByte

I added --limitOutSAMoneReadBytes 1000000 according to this post at https://groups.google.com/forum/#!msg/rna-star/4FggDmGZh-U/j_YZ0JSrx28J