Update recipes/gromacs/build.sh
Update recipes/gromacs/build.sh

Co-authored-by: Christoph Junghans <85c122975eaf65bc02ae5b5431952b1bdaabebca@gmail.com>
goanpeca/staged-recipes,ocefpaf/staged-recipes,johanneskoester/staged-recipes,kwilcox/staged-recipes,jakirkham/staged-recipes,kwilcox/staged-recipes,jakirkham/staged-recipes,conda-forge/staged-recipes,johanneskoester/staged-recipes,goanpeca/staged-recipes,ocefpaf/staged-recipes,conda-forge/staged-recipes