Vulkan: Implement setUniform for matrices correctly This fixes all these tests: dEQP-GLES2.functional.shaders.functions.datatypes.float_mat* dEQP-GLES2.functional.shaders.functions.datatypes.mat* dEQP-GLES2.functional.shaders.linkage.varying_type_mat* dEQP-GLES2.functional.shaders.matrix.* dEQP-GLES2.functional.uniform_api.value.assigned.by_pointer.render.basic.mat2_* dEQP-GLES2.functional.uniform_api.value.assigned.by_pointer.render.basic.mat3_* dEQP-GLES2.functional.shaders.conversions.matrix_to_matrix.* dEQP-GLES2.functional.shaders.conversions.matrix_combine.* dEQP-GLES2.functional.shaders.random.scalar_conversion* Bug:angleproject:2581 Bug:angleproject:2583 Bug:angleproject:2584 Bug:angleproject:2588 Change-Id: Ib8c03397f0229432292c51f4a6332f954fc8fa12 Reviewed-on: https://chromium-review.googlesource.com/1080392 Commit-Queue: Luc Ferron <lucferron@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>