[NCGenerics] trigger module mismatch

A swiftmodule can only be correctly ingested by a compiler
that has a matching state of using or not-using
NoncopyableGenerics.

The reason for this is fundamental: the absence of a Copyable
conformance in the swiftmodule indicates that a type is
noncopyable. Thus, if a compiler with NoncopyableGenerics
reads a swiftmodule that was not compiled with that feature,
it will think every type in that module is noncopyable.

Similarly, if a compiler with NoncopyableGenerics produces a
swiftmodule, there will be Copyable requirements on each
generic parameter that the compiler without the feature will
become confused about.

The solution here is to trigger a module mismatch, so that
the compiler re-generates the swiftmodule file using the
swiftinterface, which has been kept compatible with the compiler
regardless of whether the feature is enabled.

lib/DependencyScan/ModuleDependencyScanner.cpp

@@ -161,7 +161,8 @@ ModuleDependencyScanningWorker::ModuleDependencyScanningWorker(
       /*buildModuleCacheDirIfAbsent*/ false, ClangModuleCachePath,
       FEOpts.PrebuiltModuleCachePath, FEOpts.BackupModuleInterfaceDir,
       FEOpts.SerializeModuleInterfaceDependencyHashes,
-      FEOpts.shouldTrackSystemDependencies(), RequireOSSAModules_t(SILOptions));
+      FEOpts.shouldTrackSystemDependencies(), RequireOSSAModules_t(SILOptions),
+      RequireNoncopyableGenerics_t(ScanASTContext));
 
   // Set up the Clang importer.
   clangScannerModuleLoader = ClangImporter::create(