add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/sparc/boot/Makefile
..
..
@@ -7,7 +7,7 @@
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 ROOT_IMG	:= /usr/src/root.img
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 ELFTOAOUT	:= elftoaout
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-hostprogs-y	:= piggyback
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+hostprogs	:= piggyback
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 targets		:= tftpboot.img image zImage vmlinux.aout
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 clean-files	:= System.map
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