wspr: Changes to wspr for verror2

These changes were originally in
	https://veyron-review.googlesource.com/#/c/5052/
which is a step in making verror2 a reality.
However,
	https://veyron-review.googlesource.com/#/c/5349/
moved wspr into its own respository, so the changes must be separate.

Change-Id: Ie76aed32e36ed71a55dfa8def1f53295dbea8246
6 files changed
tree: 7100f69deffc947079f29cb46c8523ed338d05cc
  1. services/