Correct obviously-wrong test for gold linker.
@@ -817,7 +817,7 @@ class Environment:
v = 'unknown version'
linker = AppleDynamicLinker(compiler, for_machine, i, prefix, version=v)
elif 'GNU' in o:
- if 'gold' in 'o':
+ if 'gold' in o:
i = 'GNU ld.gold'
else:
i = 'GNU ld.bfd'
