Revert "Update build-tools to ab/9488506"

Revert submission 2384959-ninja-pool-envvar

Reason for revert: b/265919990

Reverted changes: /q/submissionid:2384959-ninja-pool-envvar

Change-Id: I7dacdb3a7d2f728096cc40133b7cf6beffb62329
572 files changed