soft link dependency locations in conda build script

[krinsman]

after installing bioconda package, PASTA repeatedly returns errors because it looks for mafft, hmmeralign, opal.jar, fasttree, and raxml not in the conda environment's binary directory, but in its Python version's site-packages directory. this is the workaround I've used which seems to work -- I don't think it's a great or stable solution, but it seems to work so far

[krinsman]

oh i just realized that this is probably the same as https://github.com/bioconda/bioconda-recipes/issues/13892