IOBufQueue::moveAsValue()

Summary: Added for symmetry with `IOBuf::cloneAsValue()`

Reviewed By: luciang

Differential Revision: D21737695

fbshipit-source-id: 40f5695565ffc7d7c389c9953bffc3ab85508ed1

folly/io/IOBufQueue.h

@@ -464,6 +464,10 @@ class IOBufQueue {
     return res;
   }
 
+  folly::IOBuf moveAsValue() {
+    return std::move(*move());
+  }
+
   /**
    * Access the front IOBuf.
    *