Move fixed typechecker slowness test for array-of-ranges from slow to fast, yay

Author: airspeedswift

validation-test/Sema/type_checker_perf/fast/rdar21930551.swift.gyb

@@ -0,0 +1,9 @@
+// RUN: %scale-test --begin 2 --end 6 --step 1 --select incrementScopeCounter %s
+// REQUIRES: OS=macosx
+// REQUIRES: asserts
+
+let _ = [
+%for i in range(0, N):
+  0..<1,
+%end
+]