Although I have various tests for asymptote in the latest tarballs
in the ../tex-test and ../asy-nontex-testfiles directories, a
repeated problem with 3D tests on amdgpu caused me to desire a
smaller, more minimal test.

The tarball should create a drawing of a cyan cylinder in pdf, png,
svg and html (i.e. webgl - rotatable) formats and a latex PDF with
the cylinder and a label describing it (using pdflatex).  This does
NOT check that the necessary prerequisites have been installed!

So 'make pdf ; make png ; ... make latex'

The resulting files are named cylpdf.* (so cylpdf.pdf for the
result), cylpng.* (cylpng.png), etc but cyllatex.* with the result
in cyllatex.pdf.

There is also a 'make clean' target.

KFM 2022-04-19.