ES31: Support program parameter queries on geometry shader This patch implements all the program queries on the geometry shader stage of a program by glGetProgramiv(), including the queries on geometry shader input/output primitives, invocations and maximum output vertices BUG=angleproject:1941 TEST=dEQP-GLES31.functional.geometry_shading.query.geometry_linked_* dEQP-GLES31.functional.geometry_shading.query.geometry_shader_invocations dEQP-GLES31.functional.state_query.program.geometry_shader_state_get_programiv Change-Id: Ibfa630c64dba5baf52ff84ce7e0bf4c567eef8c4 Reviewed-on: https://chromium-review.googlesource.com/961397 Commit-Queue: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Jiajia Qin <jiajia.qin@intel.com> Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org>