Update output file option in BwaMem task args

[mjhipp]

I was not able to successfully use the optional output file arg in the BwaMem task. All the alignments were printed to stOut and my script looked like this:

#/bin/bash
set -o pipefail
set -e
# Your command has been wrapped to facilitate piping to a log file
run () {
  bwa mem hs38DH.fa sample1.unmapped.fq '> sample1.aligned.sam'
}
run &> logs/BwaMem.sample1.76.1.log;

Notice the single quotes around the output file args. There is an easy workaround which is to just use the > operator on the task rather than the input file option.