cpu.c: ast_schedule_dim_is_parallel: pass ast_build_userinfo
cpu.c: ast_schedule_dim_is_parallel: pass ast_build_userinfo

This will give ast_schedule_dim_is_parallel access to other fields
in the structure.  In particular, it will allow the function
to access the contraction that will be added to this structure.

Signed-off-by: Sven Verdoolaege <235c10dd23b819f81cdc9756a251746bc184cab6@gmail.com>

Meinersbur/ppcg,Meinersbur/ppcg