I'm supporting this PR from the sidelines! :)
I've downloaded the release version of Pharo 7.0 and noticed there were linker resolution errors on my CentOS: `libcurl-gnutls.so` does not exist on Fedora/CentOS, only the openSSL flavor.
Plus the linker wasn't able to resolve `libssl.so.1.0.0` and `libcrypto.so.1.0.0`.
Both are fixed by this PR (I built it in a Xenial docker container), and the third parties are brought up to date, so really, two birds with one stone.
It seems Travis only has issues building the macOS versions.