[BOLT] Fix for missing entry offset

[rafauler]

Summary

Temporary fix for missing entry offset when creating address
translation tables (BAT) after D127935 landed. Will later work on
assigning a more reasonable offset different than zero.

bolt/lib/Passes/ValidateInternalCalls.cpp

for (auto II = BB.begin(); II != BB.end(); ++II) {
 
       BC.MIB->addAnnotation(Inst, getProcessedICTag(), 0U);
       InstructionListType MovedInsts = BB.splitInstructions(&Inst);
       if (!MovedInsts.empty()) {
         // Split this block at the call instruction. Create an unreachable
         // block.
         std::vector<std::unique_ptr<BinaryBasicBlock>> NewBBs;
         NewBBs.emplace_back(Function.createBasicBlock());
+        NewBBs.back()->setOffset(0);
         NewBBs.back()->addInstructions(MovedInsts.begin(), MovedInsts.end());
         BB.moveAllSuccessorsTo(NewBBs.back().get());
         Function.insertBasicBlocks(&BB, std::move(NewBBs));
       }
       // Update successors
       BB.removeAllSuccessors();
       BB.addSuccessor(Target, BB.getExecutionCount(), 0ULL);
       return true;