constraints: add as part of design documents

Let's keep all design documents in the same logical location. Updating
the file to be called 'cpu-constraints', though we may want to expand to
resource constraints going forward.

Fixes: kata-containers#417

Signed-off-by: Eric Ernst <[email protected]>

Author: Eric Ernst

Limitations.md

@@ -138,7 +138,7 @@ these commands is potentially challenging.
 See issue https://github.com/clearcontainers/runtime/issues/341 and [the constraints challenge](#the-constraints-challenge) for more information.
 
 For CPUs resource management see
-[cpu-constraints](constraints/cpu.md).
+[cpu-constraints](design/cpu-constraints.md).
 
 ### docker run and shared memory
 

design/VSocks.md

@@ -130,5 +130,5 @@ the containers are removed automatically.
 [2]: https://github.com/kata-containers/proxy
 [3]: https://github.com/hashicorp/yamux
 [4]: https://wiki.qemu.org/Features/VirtioVsock
-[5]: https://github.com/kata-containers/documentation/blob/master/constraints/cpu.md#virtual-cpus-and-kubernetes-pods
+[5]: https://github.com/kata-containers/documentation/blob/master/design/cpu-constraints.md#virtual-cpus-and-kubernetes-pods
 [6]: https://github.com/kata-containers/shim