Fix glob deps for non-wild patterns

Patterns that were not wild would return an empty "dirs" list if the
file was found. But then if they were removed, we wouldn't know to
update the glob file and re-run the primary builder.

In this case, instead of adding the final directory into the dirs list,
add the matched files themselves. Due to editors performing atomic
writes (the directory timestamp often gets updated at the same time as
file timestamp) this is probably more efficient. In either case, we're
only re-running the individual glob, which is rather cheap.

Rename startGlob/Glob return name from "dirs" to "deps" since it may
contain files now too.