MAINTAINERS: Add Maintainers for SWIG Python bindings

Adding myself as the primary maintainer and John Kacur as the backup
maintainer for the libcpupower SWIG generated Python bindings.

Suggested-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: John B. Wyatt IV <jwyatt@redhat.com>
Signed-off-by: John B. Wyatt IV <sageofredondo@gmail.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>