zlib: check failed

[BrunoBluff]

Compiling FFmpeg fails.
There is a problem during compiling "zlib"

[Vargol]

I've opened

madler/zlib#1044

Going to check if I can find a nice version to pin it to while waiting

[Vargol]

okay the last version works to pinning so v1.3.1 for now, just doing a complete build from scratch to test

[Vargol]

I've pinned zlib to v1.3.0, also had to fix the lame download URL as it look like the mirror i was using was down, now using a SourceForge redirecting URL

[Vargol]

All fixed now