test: fix hardlink-or-copy

The substitution has captures which needs to be substituted.

Author: compnerd

test/lit.cfg

@@ -1277,7 +1277,7 @@ if hasattr(config, 'target_cc_options'):
 
 config.substitutions.append(
     (r'%hardlink-or-copy\(from: *(.*), *to: *(.*)\)',
-     r'ln \1 \2 || cp \1 \2'))
+     SubstituteCaptures(r'ln \1 \2 || cp \1 \2')))
 
 config.substitutions.append(('%utils', config.swift_utils))
 config.substitutions.append(('%line-directive', '%r %s' % (sys.executable, config.line_directive)))