This is an alternative to I98c80f657f38c5e1ed5f28e5d36988a3429ad1f8
which does not modify the upload script, but rather queries the API
and manifest for what to download.
The script is a hybrid of python and bash to not implement json API
parsing badly in bash, but not replicate curl badly in python either.
The script sanity checks for dependencies, which are considered pretty
standard for any developer who would be interested in downloading logs
like this.
The role writes out the script with the correct build values coded
into it, so a potential user just has to run it without any arguments
or modification.
Change-Id: Ic33732adbfd3210191bf4976c3ee316cfc50568e
ca2ee69e60