executable bit set on macbuild/build4mac.py

Merge pull request #2158 from KLayout/issue-2154

Issue 2154

Regenerating DRC doc and stubs

Merge pull request #2109 from KLayout/maybe-fixing-2108

Trying to fix issue #2108

Fixing Python module sources

Merge branch 'master' of github.com:KLayout/klayout

Modifying definition of Timer#memory_size on Linux to become resident…

… size.

Maybe fixing Github action

Pinning setuptools to <76.0.0 for now as this version is broken for MSVC

Trying to fix github workflow