docs: Add release notes and NEWS item for 9.2.1 release

Better late than never, right?
docs: Add release notes for 9.1.7 release

Including a news item.
mesa: add plumbing for GL_ARB_texture_query_levels

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Matt Turner <mattst88@gmail.com>
glsl: add plumbing for GL_ARB_texture_query_levels

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Matt Turner <mattst88@gmail.com>
i965: ignore all texturing opcodes without a coordinate, for cubemap normalize

Previously we special-cased textureSize() but this is the more correct
condition.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Matt Turner <mattst88@gmail.com>
i965/fs: implement ir_query_levels

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Matt Turner <mattst88@gmail.com>
i965/vs: implement ir_query_levels

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Matt Turner <mattst88@gmail.com>
i965: enable ARB_texture_query_levels on Gen6+

Theoretically would work on Gen5 as well but requires GLSL 1.30, which
is not (yet) enabled by default there.

V2: Enable for Gen5 conditionally on GLSL version.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Matt Turner <mattst88@gmail.com>
docs: Mark off ARB_texture_query_levels, update relnotes

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>