Do globbing-related paperwork explicitly.

In particular, the writing of build-globs.ninja and the collection of
glob list files for build.ninja.d is now done outside of the Blueprint
invocation.

This is useful because RunBlueprint() is sometimes called multiple times
in a single soong_build invocation and because now glob processing is
not hidden by the machinery of Blueprint.

Test: Presubmits.
Change-Id: I6eb19b357901e452e6d1e7ce055f8a3bab4a74f4