bootrom-tools: add .reviewboardrc.
bootrom-tools: add .reviewboardrc.

Testing Done: you're reading this
Bug Number: trivial
Review URL: https://reviews.leaflabs.com/r/468/
Reviewed by: Morgan Girling, Jun Li, Mark Greer

Signed-off-by: Marti Bolivar <35e491f5b70a779e5455b1f9617e0073292369ca@leaflabs.com>

projectara/bootrom-tools,gregkh/bootrom-tools,gregkh/bootrom-tools,projectara/bootrom-tools,gregkh/bootrom-tools,projectara/bootrom-tools