[tz] tzcode and tzdata tar base make checks fail

[Brian Inglis via tz]

Cygwin uses separate packages of tzcode programs and tzdata files verbatim to 
support standard local time zones in preference to limited native data.

Running make check on the separate tar file fails in both cases.
When I took over the packages, I provided basic checks, but reviewed and changed 
the builds this release, and would like to reenable the built in checks you 
provide and mentioned recently.

The attached logs show the results of having the package build scripts run `make 
check` from the package build directory which is set up with symlinks to each of 
the tar sources.

Is there anything obviously missing or incorrect with `make check` invocations 
which could cause the observed failures, or things that may need changed?

--
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retrancher  but when there is no more to cut
                                -- Antoine de Saint-Exupéry>>> Testing tzdata-2025c-1.noarch
make: 'tzdata.zi' is up to date.
{ ! (curl --version) >/dev/null 2>&1 || \
            curl -sS --url https://validator.w3.org/nu/ -F out=gnu \
                  -F file=@theory.html; } >theory.ck.out && \
          test ! -s theory.ck.out || { cat theory.ck.out; exit 1; }
mv theory.ck.out theory.ck
make: *** No rule to make target 'tz-art.html', needed by 'tz-art.ck'.  Stop.
*** ERROR: make failed
>>> Testing tzcode-2025c-1.x86_64
{ ! (curl --version) >/dev/null 2>&1 || \
            curl -sS --url https://validator.w3.org/nu/ -F out=gnu \
                  -F file=@theory.html; } >theory.ck.out && \
          test ! -s theory.ck.out || { cat theory.ck.out; exit 1; }
{ ! (curl --version) >/dev/null 2>&1 || \
            curl -sS --url https://validator.w3.org/nu/ -F out=gnu \
                  -F file=@tz-art.html; } >tz-art.ck.out && \
          test ! -s tz-art.ck.out || { cat tz-art.ck.out; exit 1; }
{ ! (curl --version) >/dev/null 2>&1 || \
            curl -sS --url https://validator.w3.org/nu/ -F out=gnu \
                  -F file=@tz-how-to.html; } >tz-how-to.ck.out && \
          test ! -s tz-how-to.ck.out || { cat tz-how-to.ck.out; exit 1; }
{ ! (curl --version) >/dev/null 2>&1 || \
            curl -sS --url https://validator.w3.org/nu/ -F out=gnu \
                  -F file=@tz-link.html; } >tz-link.ck.out && \
          test ! -s tz-link.ck.out || { cat tz-link.ck.out; exit 1; }
make: *** No rule to make target 'africa', needed by 'version'.  Stop.
make: *** Waiting for unfinished jobs....
mv tz-art.ck.out tz-art.ck
mv tz-how-to.ck.out tz-how-to.ck
mv theory.ck.out theory.ck
mv tz-link.ck.out tz-link.ck
*** ERROR: make failed