[toolchain-utils] Whitelist update for debug_info_test

This CL updates the whitelist for debug_info_test stage, when checking
whether DebugInfo session exists or not.

We do not care about the debug info in autotest, so whitelisted this
directory.

BUG=chromium:813271
TEST=debug_info_test /build/kip/usr/lib/debug with -nousepkg build

Change-Id: I1ccd845462d07b0be58eb811550a00a2986a5086
Reviewed-on: https://chromium-review.googlesource.com/1044756
Commit-Ready: Zhizhou Yang <zhizhouy@chromium.org>
Tested-by: Zhizhou Yang <zhizhouy@chromium.org>
Reviewed-by: Yunlian Jiang <yunlian@chromium.org>
1 file changed