subread: add singularity and docker files

src/docker_modules/subread/1.32.2/Dockerfile

+FROM quay.io/biocontainers/subread:1.6.4--h84994c4_1
+MAINTAINER Laurent Modolo

src/docker_modules/subread/1.32.2/docker_init.sh

+#!/bin/sh
+docker build src/docker_modules/subread/1.32.2 -t 'subread:1.32.2'

src/singularity_modules/subread/1.32.2/build.sh

+#/bin/sh
+sudo singularity build --force bin/subread:1.32.2.sif docker://quay.io/biocontainers/subread:1.6.4--h84994c4_1 && \
+singularity sign bin/subread:1.32.2.sif