Update header file in VariantToVector.cpp (#501)

Summary:
This file is forked, and OSS build is broken in bfb7b01

Use the forked VariantToVector.h instead.

Pull Request resolved: #501

Reviewed By: bearzx

Differential Revision: D40051514

Pulled By: bearzx

fbshipit-source-id: 6ac7aae86b6d84f2c1678fed27e48b6aee8894dd

Author: wenleix

csrc/velox/VariantToVector.cpp

@@ -10,7 +10,7 @@
 // https://github.com/facebookincubator/velox/blob/18aff402c2b5a070ef7ec3f33cde017e90c8aa8a/velox/parse/VariantToVector.cpp
 // since parse is not part of VELOX_MINIMAL
 
-#include "velox/vector/VariantToVector.h"
+#include "VariantToVector.h"
 #include "velox/buffer/StringViewBufferHolder.h"
 #include "velox/type/Variant.h"
 #include "velox/vector/ComplexVector.h"