AST: Record -sil-serialize-all in the ModuleDecl

We want to distinguish the special case of a library built with
-sil-serialize-all, from a SIL function that is [fragile] because
of an explicitly @_transparent or @inline(__always).

For now, NFC.

lib/Serialization/SerializedModuleLoader.cpp

@@ -170,14 +170,14 @@ FileUnit *SerializedModuleLoader::loadAST(
   if (err == serialization::Status::Valid) {
     Ctx.bumpGeneration();
 
+    M.setResilienceStrategy(extendedInfo.getResilienceStrategy());
+
     // We've loaded the file. Now try to bring it into the AST.
     auto fileUnit = new (Ctx) SerializedASTFile(M, *loadedModuleFile,
                                                 extendedInfo.isSIB());
     M.addFile(*fileUnit);
     if (extendedInfo.isTestable())
       M.setTestingEnabled();
-    if (extendedInfo.isResilient())
-      M.setResilienceEnabled();
 
     auto diagLocOrInvalid = diagLoc.getValueOr(SourceLoc());
     err = loadedModuleFile->associateWithFileContext(fileUnit,