kernel: move initramfs's init script out of base-files

Keeping it in base-files was resulting in adding it to the base-files
package. This file is meant to be included manually for initramfs
images only.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit f6433eede7)

include/kernel-defaults.mk

@@ -165,7 +165,7 @@ endef
 ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),)
 define Kernel/CompileImage/Initramfs
 	$(call Kernel/Configure/Initramfs)
-	$(CP) $(GENERIC_PLATFORM_DIR)/base-files/init $(TARGET_DIR)/init
+	$(CP) $(GENERIC_PLATFORM_DIR)/other-files/init $(TARGET_DIR)/init
 	rm -rf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/usr/initramfs_data.cpio*
 	+$(MAKE) $(KERNEL_MAKEOPTS) $(if $(KERNELNAME),$(KERNELNAME),all) modules
 	$(call Kernel/CopyImage,-initramfs)