Add nproc from toybox

Change-Id: Ic09e00047c046fb60bb448811211e49720d1f579
(cherry picked from commit 6c691cf2114a4721022eb4154c31f0a67debc048)
2 files changed
tree: dd6fce48a3da345f9a221508b5322eef644d22eb
  1. common/
  2. darwin-x86/
  3. linux-x86/