Don't include the build number in the adbd binary.

We want repeatable builds for minimal OTAs.

(cherrypick of 2e93eda6.)

Bug: http://b/64634017
Bug: 64709603 (presubmit balking at the line above)
Test: repeated builds after `touch daemon/main.cpp` keep same md5sum
Change-Id: Iedeb44377ea45bbf20e2212760802198a57dc14a