[bazel] Port for 8516f54

Remove some #includes in ExpandVariadics.cpp as it will cause layering
violations.

Author: hokein

llvm/lib/Transforms/IPO/ExpandVariadics.cpp

@@ -53,15 +53,13 @@
 
 #include "llvm/Transforms/IPO/ExpandVariadics.h"
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/CodeGen/Passes.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/IRBuilder.h"
 #include "llvm/IR/IntrinsicInst.h"
 #include "llvm/IR/Module.h"
 #include "llvm/IR/PassManager.h"
 #include "llvm/InitializePasses.h"
 #include "llvm/Pass.h"
-#include "llvm/Passes/OptimizationLevel.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/TargetParser/Triple.h"
 #include "llvm/Transforms/Utils/ModuleUtils.h"

utils/bazel/llvm-project-overlay/llvm/BUILD.bazel

@@ -1755,6 +1755,7 @@ cc_library(
         ":TransformUtils",
         ":Vectorize",
         ":config",
+        ":ir_headers",
     ],
 )