ModuleInterface: Don't print imports for any bridging header

Bridging headers are incompatible with module interfaces, never print an
import for it. This becomes much more an issue with the internal
bridging header that can be used in library-evolution mode but still
needs to be hidden from clients.

rdar://171658976

lib/Frontend/ModuleInterfaceSupport.cpp

@@ -330,7 +330,8 @@ static void printImports(raw_ostream &out,
 
   for (auto import : allImports) {
     auto importedModule = import.importedModule;
-    if (importedModule->isOnoneSupportModule()) {
+    if (importedModule->isOnoneSupportModule() ||
+        importedModule->isClangHeaderImportModule()) {
       continue;
     }