Fixed broken bwa_index params line.
Fixed broken bwa_index params line.

ewels/NGI-ChIPseq,chuan-wang/NGI-ChIPseq,ewels/NGI-ChIPseq,ewels/NGI-ChIPseq,chuan-wang/NGI-ChIPseq,ewels/NGI-ChIPseq,chuan-wang/NGI-ChIPseq,ewels/NGI-ChIPseq,chuan-wang/NGI-ChIPseq