cpu.c: print_scop: extract out init_build_info
cpu.c: print_scop: extract out init_build_info

This makes it easier to add extra initializations without
cluttering print_scop.

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

Meinersbur/ppcg,Meinersbur/ppcg