Build clang,amd64-unknown-openbsd6.5,gtk2 (22-Dec-2025 20:11:43)

1. ci: Add cross builds (detail / cgit)
2. ci: Use env for native TARGET_WORKSPACE (detail / cgit)
3. env.sh: Add ns-clone option to take a branch name (detail / cgit)
4. ci: Clone same branch for deps if available (detail / cgit)
5. ci: cross: Dump toolchain testament into log (detail / cgit)

Started by upstream project netsurf build number 7298
originally caused by:

• Started by an SCM change

• origin/master