Fix flaky DiaUtilVisitorTest.LineVisitorTest
Fix flaky DiaUtilVisitorTest.LineVisitorTest

This test was flaky on machines using drive junctions, where the paths in the symbols and those inferred at test time are on different junctions.

BUG=
R=siggi@chromium.org

Review URL: https://codereview.chromium.org/1681333002 .

Eloston/syzygy,google/syzygy,google/syzygy,google/syzygy,Eloston/syzygy,google/syzygy