Merge pull request swiftlang#21425 from graydon/rdar-46073729-re-enable-I-know-not-why-or-how

[ModuleInterface] <rdar://46073729> Re-enable test that appears to be working now.

Author: graydon

test/ParseableInterface/ModuleCache/module-cache-diagnostics.swift

@@ -1,4 +1,3 @@
-// REQUIRES: rdar46073729
 // RUN: %empty-directory(%t)
 // RUN: %empty-directory(%t/modulecache)
 //
@@ -55,7 +54,7 @@
 // RUN: not %target-swift-frontend -I %t -module-cache-path %t/modulecache -enable-parseable-module-interface -emit-module -o %t/TestModule.swiftmodule -module-name TestModule %s >%t/err.txt 2>&1
 // RUN: %{python} %S/Inputs/check-is-old.py %t/modulecache/OtherModule-*.swiftmodule %t/modulecache/LeafModule-*.swiftmodule
 // RUN: %FileCheck %s -check-prefix=CHECK-ERROR <%t/err.txt
-// CHECK-ERROR: LeafModule.swiftinterface:6:8: error: no such module 'NotAModule'
+// CHECK-ERROR: LeafModule.swiftinterface:7:8: error: no such module 'NotAModule'
 // CHECK-ERROR: OtherModule.swiftinterface:4:8: error: no such module 'LeafModule'
 //
 //