Add direct deps on glob result files

n2 (a reimplemntation of ninja) adds a check that depfiles only add
dependencies on source files, not generated files, because generated
files are not guaranteed to exist before an action runs if there isn't
an explicit dependency between the two.

This is the case for our glob result files. However, we can rework the
build so that they're directly depended on instead of using a depfile.

Bug: 318434287
Test: rm -rf out && m nothing && m nothing
Change-Id: I513fa5536136e6bf19c347710f0722d696199612