ES31: Implement Geometry Shader resource queries on OpenGL This patch intends to implement all geometry shader related resource queries on OpenGL back-ends. This patch also fixes a memory leak by releasing the geometry shader compiler handle in the destructor of the Compiler. BUG=angleproject:1941, angleproject:2261 TEST=angle_end2end_tests Change-Id: Ieb69c162d2fc6c6550e145d1ec7948c3d36d4d15 Reviewed-on: https://chromium-review.googlesource.com/784552 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Corentin Wallez <cwallez@chromium.org>