Updated call in graph.cc for Clang 3.8 compiler

Debian Stretch uses Clang 3.8 which requires a call in graph.cc to
be written differntly.  Debian Jessie uses Clang 3.6.

Change-Id: I210cdff91da84732aec7f5294cf5eb9d4bbba607
diff --git a/y2018/control_loops/superstructure/arm/graph.cc b/y2018/control_loops/superstructure/arm/graph.cc
index 6544a8e..54ec79d 100644
--- a/y2018/control_loops/superstructure/arm/graph.cc
+++ b/y2018/control_loops/superstructure/arm/graph.cc
@@ -9,7 +9,7 @@
 namespace arm {
 
 SearchGraph::SearchGraph(size_t num_vertexes, std::initializer_list<Edge> edges)
-    : SearchGraph(num_vertexes, ::std::move(::std::vector<Edge>(edges))) {}
+    : SearchGraph(num_vertexes, ::std::vector<Edge>(edges)) {}
 
 SearchGraph::SearchGraph(size_t num_vertexes, std::vector<Edge> &&edges)
     : edges_(::std::move(edges)) {