[AugurProject/augur-core] Solc 0.4.24 (#734)

epheph commented on this pull request.

> @@ -9,7 +9,7 @@ FROM augurproject/python2-and-3:latest
RUN curl -sL https://deb.nodesource.com/setup_8.x | bash — \
&& apt-get install -y nodejs

-RUN wget —quiet —output-document /usr/local/bin/solc https://github.com/ethereum/solidity/releases/download/v0.4.20/solc-static-linux \

Unrelated to this PR, but i wonder if we should vendor it or checksum?