whatmask: use == in test
unac: needs newer autotools
unac: improve test
jshon: improve test
t1utils: fix test
git-tracker: improve test
iozone: fix test
enscript: improve test
sflowtool: improve test
justniffer: improve test
mp3fs: improve test
libvbucket: improve test
newick-utils: improve test
aamath: improve test
gptfdisk: improve test
mosquitto: improve test
gtk-engines: fix test
yle-dl: 2.0.2 - download stuff from areena.yle.fi

Closes #18719.

Signed-off-by: Samuel John <github@SamuelJohn.de>
yle-dl: Style and test does not dl stuff
mit-scheme: Fix CLT-only build

inreplacing some configure scripts to set MACOSX_SYSROOT.
Works for Xcode-only and CLT-only.

The patch is no longer needed. This flexibility of using
MacOS.sdk_path is unfortunately not possibe in your
patches right now.

Fixes #18717