Add optnone to work with new clang compiler am: f83b626766 am: f256bacbfa am: cd99353efc am: 46ede1543a

Original change: https://android-review.googlesource.com/c/platform/system/testing/gtest_extras/+/1895914

Change-Id: I913ec366bbba5d09e4e61d3c0de2aae6126daf35