build-indexes/fetch_fasta.sh: renamed 'hg18' to 'hg18_random_chrM' & updated info text.
build-indexes/fetch_fasta.sh: renamed 'hg18' to 'hg18_random_chrM' & updated info text.

fw1121/genomics,fw1121/genomics,fw1121/genomics,fw1121/genomics,fw1121/genomics