fix fallback case so dependancies work as expected

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DEFAULT_KERNEL_HEADERS:=$(strip $(subst ",, $(BR2_DEFAULT_KERNEL_HEADERS)))

#"

ifneq ($(filter $(TARGETS),kernel-headers),)

DEFAULT_KERNEL_HEADERS:=$(strip $(DEFAULT_KERNEL_HEADERS))

LINUX_HEADERS_SITE:=127.0.0.1

LINUX_HEADERS_SOURCE:=unspecified-kernel-headers

LINUX_HEADERS_UNPACK_DIR:=$(TOOL_BUILD_DIR)/linux-libc-headers-null

ifeq ("$(strip $(DEFAULT_KERNEL_HEADERS))","2.4.25")

VERSION:=2

kernel-headers-dirclean:

	rm -rf $(LINUX_HEADERS_DIR)

endif