Log Message:
zziplib: updated to 0.13.77

release v0.13.77

* make afl to check for fuzzer bugs
* update os versions to latest from docker_mirror.py
* add missing tests scenarios for later os releases
* fix Coverage include hack
* integrate mxe/src/zziplib-2-prefer-win32-mmap.patch
* make crossgcc/windows a working example for mingw
* `./testbuilds.py clean` will drop test-related docker images
* `./testbuilds.py` will automatically run clean if everything successful
* `./testbuilds.py help` shows the available tests and commands
* in test_2xx create /external bins and compile them by linking via cmake-configs
* fix bins/CMakeLists.txt to show realistic usage of cmake find_package
* note: it seems bins/unzzip*.c use internal headers which external programs can't