tac: new applet. ~240 bytes.

Copyright (C) 2003  Yang Xiaopeng  <yxp at hanwang.com.cn>
Copyright (C) 2007  Natanael Copa  <natanael.copa@gmail.com>
Copyright (C) 2007  Tito Ragusa    <farmatito@tiscali.it>

coreutils/Config.in

@@ -579,6 +579,12 @@ config SYNC
 	help
 	  sync is used to flush filesystem buffers.
 
+config TAC
+	bool "tac"
+	default n
+	help
+	  tac is used to concatenate and print files in reverse.
+
 config TAIL
 	bool "tail"
 	default n

coreutils/Kbuild

@@ -66,6 +66,7 @@ lib-$(CONFIG_STAT)      += stat.o
 lib-$(CONFIG_STTY)      += stty.o
 lib-$(CONFIG_SUM)       += sum.o
 lib-$(CONFIG_SYNC)      += sync.o
+lib-$(CONFIG_TAC)       += tac.o
 lib-$(CONFIG_TAIL)      += tail.o
 lib-$(CONFIG_TEE)       += tee.o
 lib-$(CONFIG_TEST)      += test.o