builder_describe and builder_parse should come before other tests, so
that (a) scripts can return --help details, and (b) so that
builder.inc.sh can tell that the script is a valid builder script, even
if environment means that the script will not otherwise run.
Note: there is a bit of potential confusion about the difference between
/resources/builder.inc.sh (the full implementation for builder scripts),
and /resources/build/builder.inc.sh (the source script that builder
scripts should always use).
This allows us to make assumptions that will always be true for builder
scripts that may not be true for other scripts, such as setting base
folder.
This sets us up to run all common/ and resources/ tests from a single
script, common/build.sh. This test will be run on each platform for all
changes made in common/ or resources/.
Also renamed files and paths for consistency in resources/ and updated
tests accordingly.
