Add `using ConvertToLLVMPattern::match/matchAndRewrite` to avoid 'hiding overload' warning.

mlir/include/mlir/Conversion/StandardToLLVM/ConvertStandardToLLVM.h

public:
   matchAndRewrite(SourceOp op, ArrayRef<Value> operands,
                   ConversionPatternRewriter &rewriter) const {
     if (succeeded(match(op))) {
       rewrite(op, operands, rewriter);
       return success();
     }
     return failure();
   }
+
+private:
+  using ConvertToLLVMPattern::match;
+  using ConvertToLLVMPattern::matchAndRewrite;
 };
 
 namespace LLVM {
 namespace detail {
 /// Replaces the given operation "op" with a new operation of type "targetOp"
 /// and given operands.
 LogicalResult oneToOneRewrite(Operation *op, StringRef targetOp,
                               ValueRange operands,