Build failed

[iboates]

I tried building today and it failed. I don't really know much about Docker as I am still learning the basics, and I thought trying to get GDAL in a running container would be a good exercise. Anyway I tried running the build command at the end of the README and I get this at the end of the log:

Processing triggers for sgml-base (1.26+nmu4ubuntu1) ...
patching file ./gdal/ci/travis/trusty_clang/before_install.sh
Hunk #2 succeeded at 60 with fuzz 1.
patching file ./gdal/ci/travis/trusty_clang/install.sh
Hunk #1 FAILED at 17.
Hunk #3 succeeded at 52 with fuzz 1 (offset -3 lines).
1 out of 3 hunks FAILED -- saving rejects to file ./gdal/ci/travis/trusty_clang/install.sh.rej
The command '/bin/sh -c /usr/local/src/gdal-docker/build.sh' returned a non-zero code: 1

Full log at: https://pastebin.com/i9qQqf5E