Support colcon workspace with bullet and ode (#1389)

* colcon.pkg: DART depend on ODE, BULLET_PHYSICS

* Add file header to colcon.pkg

Author: scpeters

colcon.pkg

@@ -0,0 +1,9 @@
+# Configuration file for colcon (https://colcon.readthedocs.io).
+#
+# Please see the doc for the details of the spec:
+#   - https://colcon.readthedocs.io/en/released/user/configuration.html#colcon-pkg-files
+
+{
+  "name": "DART",
+  "dependencies": ["BULLET_PHYSICS", "ODE"],
+}