Potential for temp_dir to not exist during add_matched_rna

[bryce-turner]

It's possible for the temp_dir referenced here to not exist, we should add a mkdir -p before this line.

phoenix/modules/tumor_only/rna_variant_check.jst

Line 79 in 9f04da2

{{ temp_dir }}/contig_lengths.txt

This case pops up if we add new RNA sequencing data to a project that already had it's genome processed - e.g. temp/genome/tumor_only_variant_calls/vcfmerger2 does not exist anymore.