Varying invariance must match between shaders in ESSL 1.00 While in ESSL 3.00 invariant is allowed only for out varyings. Verify that, and update test expectations. BUG=angleproject:1293 TEST=GLSLTest*.Invariant* Change-Id: I5cab6c68f2b94ea2179719119668d905fe7a9b3d Reviewed-on: https://chromium-review.googlesource.com/352743 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Yuly Novikov <ynovikov@chromium.org>