Amend test to actually fail due to SR-13032 (swiftlang#35038)

Author: scentini

test/Interop/C/modules/print-qualified-clang-types/Inputs/module.modulemap

@@ -1,13 +1,7 @@
 module ForeignA {
-  // Nest the header in a sub-module to make sure these are handled correctly.
-  module Sub {
-    header "foreign-a.h"
-  }
+  header "foreign-a.h"
 }
 
 module ForeignB {
-  // Nest the header in a sub-module to make sure these are handled correctly.
-  module Sub {
-    header "foreign-b.h"
-  }
+  header "foreign-b.h"
 }

test/Interop/C/modules/print-qualified-clang-types/Inputs/textual-header.h

@@ -1 +1 @@
-typedef struct {} ForeignStruct;
+struct ForeignStruct {};

test/Interop/C/modules/print-qualified-clang-types/print-qualified-clang-types.swift

@@ -34,3 +34,5 @@
 // RUN: %target-swift-frontend -typecheck -swift-version 5 %t/main_module/MainModule.swiftinterface -I %t/helper_module -I %S/Inputs
 
 // CHECK: public func funcTakingForeignStruct(_ param: ForeignB.ForeignStruct)
+
+// REQUIRES: SR-13032