tree d4abaabf2b7eb30c135a90db5fb3f02dde9d150a
parent 235f301f365b2d4502702df9604609252c57d662
author janakr <janakr@google.com> 1522256295 -0700
committer Copybara-Service <copybara-piper@google.com> 1522256372 -0700

Put configuration checksum into BuildOptions$OptionsDiffForReconstruction and make it available to ConfiguredTarget. Also give BuildConfigurationValue.Key the same toString() that BuildConfiguration had, so we recover how we used to print out ConfiguredTarget labels in debugging.

This may have a tiny bit of overhead in serialization, but we'll cross that bridge when we come to it. Could just make the string a constant.

PiperOrigin-RevId: 190787145