[test] Test previous commits with bridging headers too.

(both precompiled and non-precompiled)

Author: jrose-apple

test/Serialization/xref-nested-clang-type.swift

@@ -1,9 +1,17 @@
 // RUN: %empty-directory(%t)
-
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -emit-module -o %t -I %S/Inputs/xref-nested-clang-type/ %s -module-name Lib
-
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -typecheck -I %t -I %S/Inputs/xref-nested-clang-type/ %s -DCLIENT -verify
 
+// RUN: %empty-directory(%t)
+// RUN: cp %S/Inputs/xref-nested-clang-type/NestedClangTypes.h %t
+// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -emit-module -o %t -import-objc-header %t/NestedClangTypes.h %s -module-name Lib -DNO_MODULE
+// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -typecheck -I %t -import-objc-header %t/NestedClangTypes.h %s -DCLIENT -verify
+
+// RUN: %empty-directory(%t)
+// RUN: cp %S/Inputs/xref-nested-clang-type/NestedClangTypes.h %t
+// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -emit-module -o %t -import-objc-header %t/NestedClangTypes.h -pch-output-dir %t/PCHCache %s -module-name Lib -DNO_MODULE
+// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -typecheck -I %t -pch-output-dir %t/PCHCache -import-objc-header %t/NestedClangTypes.h %s -DCLIENT -verify
+
 #if CLIENT
 
 import Lib
@@ -17,7 +25,9 @@ func test(x: MyCode) {}
 
 #else // CLIENT
 
+#if !NO_MODULE
 import NestedClangTypes
+#endif
 
 public typealias MyOuter = Outer
 public typealias MyInner = Outer.InterestingValue