Fix typo

build_test is only run on presubmit in internal master
for cls that change build/make and a few other repos,
but notably not build/soong. Add this cl to a topic
with a build/soong change we'd like to test with build_test.

Bug: 220375749
Test: Presubmits
Change-Id: I3e2f59e5f341cce486368dac9bf2f28f265e53fd