[tz] iana build failures on Windows

Hello Paul, recent changes in the sources cause build failures on Windows, see: nmake /A /D /C /S makefile(828) : U1002: syntax error : invalid macro invocation '$' Stop. The related change was https://github.com/eggert/tz/commit/34c4662760df3af2ad9ec0aab5cc3ffba51dde80 Makefile - $(AWK) '/^Link/ {print $$3}' backward | LC_ALL=C sort -cu + $(AWK) '/^Link/ {printf "%.5d %s\n", g, $$3} /^$$/ {g++}' \ + backward | LC_ALL=C sort -cu Can you please recommend a fix for me to test? Thank you! Regards Manuela Friedrich