sspace-standard: use Getopt::Std instead of getopts.pl (#9516)

getopts.pl is not listed as a Spack dependency of sspace-standard,
so without this change, this package was only working on systems
where getopts.pl was already installed.

var/spack/repos/builtin/packages/sspace-standard/package.py

@@ -55,6 +55,9 @@ def install(self, spec, prefix):
         for s in scripts:
             filter_file('/usr/bin/perl', '/usr/bin/env perl',
                         s, string=True)
+            filter_file('require "getopts.pl";', 'use Getopt::Std;',
+                        s, string=True)
+            filter_file('&Getopts(', 'getopts(', s, string=True)
 
         install_tree('bin', prefix.bin)
         install_tree('bowtie', prefix.bowtie)