Add recipe for FragGeneScanRs

[ninewise]

Add a recipe for FragGeneScanRs, a tool predict genes in short reads.

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Please read the guidelines for Bioconda recipes before opening a pull request (PR).

General instructions

• If this PR adds or updates a recipe, use "Add" or "Update" appropriately as the first word in its title.
• New recipes not directly relevant to the biological sciences need to be submitted to the conda-forge channel instead of Bioconda.
• PRs require reviews prior to being merged. Once your PR is passing tests and ready to be merged, please issue the @BiocondaBot please add label command.
• Please post questions on Gitter or ping @bioconda/core in a comment.