util/u_pstipple.c: copy immediates during transformation
util/u_pstipple.c: copy immediates during transformation

Apparently, nobody has combined stippling with a fragment shader
containing immediates in almost five years...

Fixes a bug in Kodi with radeonsi reported by Christian König.

Cc: "11.0 11.1" <59f39c0db42d4479a46b02d4d2bc11120e37bb44@lists.freedesktop.org>
Tested-by: Christian König <c7ea837d7a46effe4232b086213468b8b31643bf@amd.com>
Reviewed-by: Marek Olšák <8c7344a1abdb103e79ecfd488098373070c3c70e@amd.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler