mesa: Add _NEW_PATCH state flag; use it for builtin uniforms

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
remove junk
debug
plumbing
fiddle with icp reservation
thing
mask fixup
things
thing
zzz
zzz
things
get rid of weird predicate
i965: Trigger HS recompiles when patch size changes

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