Fix StackIDTest compilation issue

Commit 9c8e716 updated some APIs that are used by this
downstream-only test.

(cherry picked from commit 5d30e9c)

Author: felipepiovezan

lldb/unittests/StackID/StackIDTest.cpp

@@ -68,8 +68,8 @@ enum OnStack { Yes, No };
 /// Helper class to enable testing StackID::IsYounger.
 struct MockStackID : StackID {
   MockStackID(addr_t cfa, OnStack on_stack) : StackID() {
-    SetPC(0);
-    SetCFA(cfa);
+    SetPC(0, nullptr);
+    SetCFA(cfa, nullptr);
     m_cfa_on_stack = on_stack == OnStack::Yes ? LazyBool::eLazyBoolYes
                                               : LazyBool::eLazyBoolNo;
   }