ProgramGL: Mark all columns of matrix attributes as active The active attributes are used to determine which of the vertex attributes to enable. Matrices take up several attributes depending on the number of column they have; this patch marks all the columns of active matrix attributes as active. TEST=dEQP-GLES2.functional.shaders.linkage.varying_type_mat* BUG=angleproject:1127 Change-Id: I82f548f329f872c4e66aa0e4e71c6061a55b9987 Reviewed-on: https://chromium-review.googlesource.com/294261 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Tested-by: Corentin Wallez <cwallez@chromium.org>