[llvm][asmprinter] Make call graph section deterministic (llvm#167400)

The call-graph-section-assembly.ll tests in CodeGen/X86 and
CodeGen/Aarch64 bot fail under LLVM_REVERSE_ITERATION. These sets should
use SetVector to avoid non-determinism in the ouput.

Author: ilovepi

llvm/include/llvm/CodeGen/AsmPrinter.h

@@ -18,7 +18,7 @@
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
 #include "llvm/ADT/MapVector.h"
-#include "llvm/ADT/SmallSet.h"
+#include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/Analysis/ProfileSummaryInfo.h"
 #include "llvm/Analysis/StaticDataProfileInfo.h"
@@ -207,9 +207,9 @@ class LLVM_ABI AsmPrinter : public MachineFunctionPass {
     using CGTypeId = uint64_t;
 
     /// Unique target type IDs.
-    SmallSet<CGTypeId, 4> IndirectCalleeTypeIDs;
+    SmallSetVector<CGTypeId, 4> IndirectCalleeTypeIDs;
     /// Unique direct callees.
-    SmallSet<MCSymbol *, 4> DirectCallees;
+    SmallSetVector<MCSymbol *, 4> DirectCallees;
   };
 
   enum CallGraphSectionFormatVersion : uint8_t {