singularity in2p3: fix symlink

src/.singularity_in2p3/lbmc-bcftools-1.7.img

src/.singularity_in2p3/lbmc-bcftools-1.7.img**

src/.singularity_in2p3/lbmc-bedtools-2.25.0.img

src/.singularity_in2p3/lbmc-bedtools-2.25.0.img*

src/.singularity_in2p3/lbmc-bioawk-1.0.img

src/.singularity_in2p3/lbmc-bioawk-1.0.img**

src/.singularity_in2p3/lbmc-bowtie-1.2.2.img

src/.singularity_in2p3/lbmc-bowtie-1.2.2.img**

src/.singularity_in2p3/lbmc-bowtie2-2.3.4.1.img

src/.singularity_in2p3/lbmc-bowtie2-2.3.4.1.img*

src/.singularity_in2p3/lbmc-bwa-0.7.17.img

src/.singularity_in2p3/lbmc-bwa-0.7.17.img**

src/.singularity_in2p3/lbmc-canu-1.6.img

src/.singularity_in2p3/lbmc-canu-1.6.img**

src/.singularity_in2p3/lbmc-cutadapt-1.14.img

src/.singularity_in2p3/lbmc-cutadapt-1.14.img**

src/.singularity_in2p3/lbmc-cutadapt-1.15.img

src/.singularity_in2p3/lbmc-cutadapt-1.15.img**

src/.singularity_in2p3/lbmc-cutadapt-2.1.img

src/.singularity_in2p3/lbmc-cutadapt-2.1.img**