Use flags in casadi_velocity_mpc

This sets us up to do batch runs easily.

Change-Id: I0677b2f36ca091b930aeb56e6e48f862901f9c7a
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/frc971/control_loops/swerve/BUILD b/frc971/control_loops/swerve/BUILD
index cbc4e66..dcbf50a 100644
--- a/frc971/control_loops/swerve/BUILD
+++ b/frc971/control_loops/swerve/BUILD
@@ -219,6 +219,7 @@
     ],
     deps = [
         ":dynamics",
+        "@pip//absl_py",
         "@pip//casadi",
         "@pip//matplotlib",
         "@pip//numpy",