mesa: Trivial clean-ups in uniform_query.cpp
mesa: Trivial clean-ups in uniform_query.cpp

This is C++, so we can mix code and declarations.  Doing so allows
constification.

Signed-off-by: Ian Romanick <2b237cafb16dc45038e85df6c85e74e6d899eba9@intel.com>
Reviewed-by: Plamena Manolova <6e3d0a3190b3ecb5aa3b51200dd755290989ee5d@intel.com>
Reviewed-by: Jordan Justen <a79006884ba9cf5f4f7fcbb92a15b208780d8c97@intel.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler