Use llvm::arrayRefFromStringRef

Differential Revision: https://reviews.llvm.org/D53432

llvm-svn: 344888
diff --git a/lld/wasm/Writer.cpp b/lld/wasm/Writer.cpp
index 3d44bce..64dce4c 100644
--- a/lld/wasm/Writer.cpp
+++ b/lld/wasm/Writer.cpp
@@ -979,7 +979,7 @@
     OS << BodyContent;
   }
 
-  ArrayRef<uint8_t> Body = toArrayRef(Saver.save(FunctionBody));
+  ArrayRef<uint8_t> Body = arrayRefFromStringRef(Saver.save(FunctionBody));
   cast<SyntheticFunction>(WasmSym::CallCtors->Function)->setBody(Body);
 }