ModuleInterface: Fix use-after-free when cloning SPI attributes.

Resolves rdar://94176931.

Author: tshortli

lib/AST/Attr.cpp

@@ -1951,7 +1951,7 @@ SPIAccessControlAttr *SPIAccessControlAttr::clone(ASTContext &C,
                                                   bool implicit) const {
   auto *attr = new (C) SPIAccessControlAttr(
       implicit ? SourceLoc() : AtLoc, implicit ? SourceRange() : getRange(),
-      getSPIGroups());
+      C.AllocateCopy(getSPIGroups()));
   attr->setImplicit(implicit);
   return attr;
 }