kbuild: move subdir-obj-y to scripts/Makefile.build

# ===========================================================================

subdir-obj-y := $(filter %/built-in.a, $(real-obj-y))

ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)

lib-target := $(obj)/lib.a

endif

multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)) $($(m:.o=-))), $(m))))

multi-used   := $(multi-used-y) $(multi-used-m)

# $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to

# tell kbuild to descend

subdir-obj-y := $(filter %/built-in.a, $(obj-y))

# Replace multi-part objects by their individual parts,

# including built-in.a from subdirectories

real-obj-y := $(foreach m, $(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))

modorder	:= $(addprefix $(obj)/,$(modorder))

obj-m		:= $(addprefix $(obj)/,$(obj-m))

lib-y		:= $(addprefix $(obj)/,$(lib-y))

subdir-obj-y	:= $(addprefix $(obj)/,$(subdir-obj-y))

real-obj-y	:= $(addprefix $(obj)/,$(real-obj-y))

real-obj-m	:= $(addprefix $(obj)/,$(real-obj-m))

multi-used-m	:= $(addprefix $(obj)/,$(multi-used-m))