This reverts commit b7276eca0182bb6ad174ef044bb5f6f0504451af.
Although the brand new pngfuzz repo is coming up next, it turned out
that the deletion of contrib/oss-fuzz/ from the 'libpng16' branch was
premature. (Oopsie!)
Signed-off-by: Cosmin Truta <ctruta@gmail.com>
A new repository named "pngfuzz", dedicated to fuzz testing PNG
processing software in general and libpng in particular, has been
created:
https://github.com/pnggroup/pngfuzz
Signed-off-by: Cosmin Truta <ctruta@gmail.com>