Merge pull request #69097 from etcwilde/ewilde/import-set-vector

Include llvm::SmallSetVector

Author: etcwilde

include/swift/AST/Module.h

@@ -33,6 +33,7 @@
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/Optional.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/Support/ErrorHandling.h"