Make CT build and add a double jointed arm optimization.

Add an arm move simulation which needs to avoid a box.  It's a
starting point for future work.

Change-Id: I1d84a7749376d853acf72c9fb7b9a43af7caabfa
diff --git a/y2018/control_loops/python/BUILD b/y2018/control_loops/python/BUILD
index 042c39e..a72c464 100644
--- a/y2018/control_loops/python/BUILD
+++ b/y2018/control_loops/python/BUILD
@@ -69,3 +69,16 @@
   ],
   restricted_to = ['//tools:k8'],
 )
+
+cc_binary(
+    name = "arm_mpc",
+    srcs = [
+        "arm_mpc.cc",
+    ],
+    deps = [
+        "//third_party/ct",
+        "//third_party/matplotlib-cpp",
+        "//third_party/gflags",
+    ],
+    restricted_to = ["//tools:k8"],
+)