StackCounter adds if-check when all BB have a non-zero alloca counter

[ahueck]

Expected: if check is added when not all predecessor BBs have a non-zero counter, see

TypeART/lib/passes/instrumentation/TransformUtil.h

Lines 63 to 69 in 223224d

	const auto all_preds_have_counter = llvm::all_of(
	llvm::predecessors(I->getParent()), [&allocCounts](const auto* bb) { return allocCounts.count(bb) > 0; });
	if (all_preds_have_counter) {
	auto* cond = irb->CreateICmpNE(counter_load, instr_helper->getConstantFor(IType::stack_count), "__ta_cond");
	auto* then_term = SplitBlockAndInsertIfThen(cond, I, false);
	irb->SetInsertPoint(then_term);
	}