Upgrade klayout to 0.25.4

Summary:
klayout 0.25.4 was released. It requires a patch to compile.

Changelog: https://www.klayout.de/development.html

Test Plan: Open a few GDS files (kB to GB in size) and browse the layout.

Reviewers: Triage Team, sunnyflunk

Reviewed By: Triage Team, sunnyflunk

Subscribers: sunnyflunk

Differential Revision: https://dev.getsol.us/D3841