Resolve symlinks for the riak script

[jcoyne]

When using homebrew:

cat: /usr/local/releases/start_erl.data: No such file or directory
db/test/1/bin/riak: line 84: /usr/local/erts-/bin/escript: No such file or directory
db/test/1/bin/riak: line 219: /usr/local/erts-/bin/escript: No such file or directory
Error reading /workspace/db/test/1/etc/app.config

with riak 1.0.3

[gordoncww]

@jcoyne I worked around that issue by setting the source path to riak's libexec directory in test_server.yml, e.g. source: /usr/local/Cellar/riak/1.1.1x86_64/libexec/bin

That will result in the riak script being built with a valid RUNNER_BASE_DIR, which it uses to find all the files you mention.