Fix extraneous print of -j. am: 5a1e23a9de am: 7b0a6f2750 am: c1aedcfc3f

Original change: https://android-review.googlesource.com/c/platform/system/testing/gtest_extras/+/1403789

Change-Id: I7004e0ec034ac254ff4ffc93c5e98a0fe2bb606f