this benchmark is failing frequently on some boards (maybe ARM64?)

see:

https://wmatrix.googleplex.com/retry_teststats/?days_back=30&tests=graphics_GLBench

here is a particular example. 


https://uberchromegw.corp.google.com/i/chromeos/builders/arm64-llvm-toolchain/builds/161

where it fails with 

FAIL: Failed: Some images are not matching their references. Check /tmp/test_that_latest/graphics_GLBench/summary.txt for details.

Please fix. 

assigning to ihf for guidance of who the best owner could be.