glsl/builtins: Fix invalid vecN constants in hyperbolic functions.

glsl/builtins: Fix invalid vecN constants in hyperbolic functions.

Each of these vecN constants only provided one component, which is
illegal.  The printed IR is meant to contain exactly as many components
as are necessary; the IR reader does not splat single values.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Paul Berry <stereotype441@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>