Update TMB calculation (5/11)

[komalsrathi]

Created off of update-subtyping Updating TMB calculation. Sample sizes incremented by 2.

# old sample size
cat results/wgs_paired/snv-mutation-tmb-all.tsv | wc -l
      72
cat results/wgs_paired/snv-mutation-tmb-coding.tsv | wc -l 
      72
cat results/wgs_tumor_only/snv-mutation-tmb-all.tsv | wc -l
      89
cat results/wgs_tumor_only/snv-mutation-tmb-coding.tsv | wc -l
      89

# new sample size
cat results/wgs_paired/snv-mutation-tmb-all.tsv | wc -l   
      74
cat results/wgs_paired/snv-mutation-tmb-coding.tsv | wc -l 
      74
cat results/wgs_tumor_only/snv-mutation-tmb-all.tsv | wc -l   
      91
cat results/wgs_tumor_only/snv-mutation-tmb-coding.tsv | wc -l
      91