[infra] make addr2line silent when checking existence

Pipe stdout/stderr to /dev/null when running it to check for its
existence. This avoids confusing text in the build log which may
lead some readers to think that addr2line was being run incorrectly.

Change-Id: I791153ad741a3088bdbb0f44603959234bdc7814
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/615636
Commit-Queue: Chris Mumford <cmumford@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
1 file changed