Skip MultithreadingTest.MultiCreateContext on Ozone On Linux this test is supported with GLX but not EGL, so Ozone (which uses EGL) fails. Update the test suppression to avoid Linux Ozone. TBR=geofflang@chromium.org Bug: angleproject:4725 Change-Id: I9e85b51a01ab5b25c6cbbdbcdbbfb4b21b7a6152 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2270021 Commit-Queue: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org>