make.go: Fix windows build.

Running genfileembed on Windows requires .exe extension.

Change-Id: I34440db9c2f719c87149c16ef40a71433bf256fe
client: replace CAMLI_CLIENT_IDENTITY with CAMLI_KEYID

And remove all mentions of CAMLI_CLIENT_IDENTITY because there isn't any
need for the both of them.

http://camlistore.org/issue/412

Change-Id: I0d6b8cff0f23738231de98171a23550d82f05fe9
Merge "make.go: Fix windows build."
Merge "client: replace CAMLI_CLIENT_IDENTITY with CAMLI_KEYID"
C+A: add Joshua Gay (Individual CLA)

Change-Id: I4e4ab54605449f79e2f619be305c82ee1a62d626