tree cc8f94af9b4657524cac910e06a078acf407635c
parent e020ba9ce0d4bc02598f67d431388204b7734711
author Cole Faust <colefaust@google.com> 1704318348 -0800
committer LaMont Jones <lamontjones@google.com> 1720640132 -0700

Allow n2 as a replacement for ninja in builds

If `SOONG_USE_N2=true` is set in the environment, then n2 is used in
place of ninja.  Some ninja features are not available in n2 at this
time, but this enables bringup efforts to happen in parallel.

Bug: 352368206
Test: manual
Change-Id: I8455cb24eb640a4651782ee76e48a7d3a9932b93