Add ode45 to runge_kutta.h

This gives us a way to integrate with an adaptive step size for when we
don't know the time constants super well.

Change-Id: Ie6073c208ae9988957f0c4cd79f9519a4a978efe
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/frc971/control_loops/BUILD b/frc971/control_loops/BUILD
index f5a720f..ccaac40 100644
--- a/frc971/control_loops/BUILD
+++ b/frc971/control_loops/BUILD
@@ -382,9 +382,11 @@
     name = "runge_kutta",
     hdrs = [
         "runge_kutta.h",
+        "runge_kutta_helpers.h",
     ],
     target_compatible_with = ["@platforms//os:linux"],
     deps = [
+        "@com_github_google_glog//:glog",
         "@org_tuxfamily_eigen//:eigen",
     ],
 )