docs: fix ASAN instructions

No-Try: true
Docs-Preview: https://skia.org/?cl=166981
Change-Id: I80291d63fef1c5648109d0f03099a7e1ab64fbd4
Reviewed-on: https://skia-review.googlesource.com/c/166981
Auto-Submit: Hal Canary <halcanary@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
1 file changed