Added --srcdir="${COOKBOOK_SOURCE}" to zsh configure flags to fix
the config.status error '/subs1.awk: Permission denied' during
cross-compilation. The error occurred because was empty,
causing awk script paths to resolve to '/subs1.awk' instead of
the correct source directory path.
Also added chmod +x on Src/*.awk to ensure configure-generated
config.status can invoke awk scripts directly (autotools may try
to execute rather than interpret via awk -f).
This unblocks Phase 2.1 end-to-end build test.
vasilito