PosixFS can get PathStats for a set of PathBufs (#5783)
PosixFS can get PathStats for a set of PathBufs (#5783)

Currently, it can only do so for globs. For local process execution, we
don't want to glob across the output files, we want to use a list of
literal paths.
tdyas/pants,baroquebobcat/pants,pantsbuild/pants,tdyas/pants,tdyas/pants,baroquebobcat/pants,pantsbuild/pants,foursquare/pants,wisechengyi/pants,baroquebobcat/pants,benjyw/pants,twitter/pants,foursquare/pants,tdyas/pants,baroquebobcat/pants,foursquare/pants,wisechengyi/pants,twitter/pants,benjyw/pants,twitter/pants,twitter/pants,tdyas/pants,pantsbuild/pants,benjyw/pants,twitter/pants,twitter/pants,wisechengyi/pants,baroquebobcat/pants,pantsbuild/pants,benjyw/pants,twitter/pants,wisechengyi/pants,jsirois/pants,baroquebobcat/pants,baroquebobcat/pants,foursquare/pants,tdyas/pants,wisechengyi/pants,tdyas/pants,pantsbuild/pants,baroquebobcat/pants,benjyw/pants,foursquare/pants,benjyw/pants,wisechengyi/pants,pantsbuild/pants,foursquare/pants,twitter/pants,baroquebobcat/pants,jsirois/pants,foursquare/pants,wisechengyi/pants,wisechengyi/pants,benjyw/pants,wisechengyi/pants,twitter/pants,tdyas/pants,jsirois/pants,foursquare/pants,pantsbuild/pants,tdyas/pants,foursquare/pants