Bug 1729726 - fix issue on windows where symlink doesn't work....

Bug 1729726 - fix issue on windows where symlink doesn't work. r=perftest-reviewers,AlexandruIonescu

Differential Revision: https://phabricator.services.mozilla.com/D124927

testing/raptor/mach_commands.py

@@ -135,7 +135,7 @@ class RaptorRunner(MozbuildObject):
                 if not os.path.isdir(path) or name.startswith("."):
                     continue
 
-                if hasattr(os, "symlink"):
+                if hasattr(os, "symlink") and os.name != "nt":
                     if not os.path.exists(dest):
                         os.symlink(path, dest)
                 else: