misc/py-anita: update to 1.45

Changes from 1.44:

Support xz compressed distribution sets.

Support NetBSD/vax via simh.  Installing and booting works;
running the ATF tests does not.  From Utkarsh Anand.

Mark the NumberedVersion and Release classes as deprecated.

Remove the obsolete clases DailyBuild and LocalBuild.

Fix a bug that caused the guest OS to unnecessarily boot twice
when entering "interact" mode since version 1.43.

Don't send a spurious "x" at the end of installation.

Log the pexpect version.

(gson)