Log Message:
octave: amend wrapper patches to be netbsd-specific. fix sunOS build

octave is using gnulib for portability, but has an additional wrapper
around it. unfortunately that means that this type signature is no longer
portable. netbsd doesn't have struct tm_zone, others do.

I failed to use gnulib to provide struct tm_zone, using an OS-specific macro
as an ugly hack.

reported by hans