Suppress EGLSurfaceTest.MakeCurrentTwice on Mac chromium builds
Suppress EGLSurfaceTest.MakeCurrentTwice on Mac chromium builds

This is to remove a failure on the intel trybots were ANGLE is currently
enable to create any context while this test expects creation to
succeed.

BUG=angleproject:891

Change-Id: I0450da3211fd958a17f6db0d7e2a85968d6e3a87
Reviewed-on: https://chromium-review.googlesource.com/304730
Tryjob-Request: Corentin Wallez <470c533e86f4f848c98c7e11fffc2d043494a401@chromium.org>
Reviewed-by: Geoff Lang <b6fc25fe0362055230985c05cbfa8adb741ccc0f@chromium.org>
Tested-by: Corentin Wallez <470c533e86f4f848c98c7e11fffc2d043494a401@chromium.org>

MSOpenTech/angle,ppy/angle,MSOpenTech/angle,mlfarrell/angle,ecoal95/angle,mlfarrell/angle,mikolalysenko/angle,mikolalysenko/angle,ecoal95/angle,ppy/angle,mlfarrell/angle,mybios/angle,mybios/angle,ppy/angle,mikolalysenko/angle,mybios/angle,ecoal95/angle,mybios/angle,mlfarrell/angle,ecoal95/angle,MSOpenTech/angle,ecoal95/angle,ppy/angle,mikolalysenko/angle,domokit/waterfall,domokit/waterfall,MSOpenTech/angle