[PATCH 4/4 v20] Add xmethod support to the Python API

[Pedro Alves]

Hi Siva,

Thanks for working on this.

FYI, I saw that the new tests fail against GDBserver.  I filed
a PR17017 for it:

https://sourceware.org/bugzilla/show_bug.cgi?id=17017

-- 
Pedro Alves