expand, unexpand: new applets from Tito <farmatito@tiscali.it>

diff --git a/coreutils/Kbuild b/coreutils/Kbuild
index fd67d6c..ce21b3a 100644
--- a/coreutils/Kbuild
+++ b/coreutils/Kbuild
@@ -31,6 +31,7 @@
 lib-$(CONFIG_ASH)       += echo.o # used by ash
 lib-$(CONFIG_ENV)       += env.o
 lib-$(CONFIG_EXPR)      += expr.o
+lib-$(CONFIG_EXPAND)    += expand.o
 lib-$(CONFIG_FALSE)     += false.o
 lib-$(CONFIG_FOLD)      += fold.o
 lib-$(CONFIG_HEAD)      += head.o
@@ -74,6 +75,7 @@
 lib-$(CONFIG_TRUE)      += true.o
 lib-$(CONFIG_TTY)       += tty.o
 lib-$(CONFIG_UNAME)     += uname.o
+lib-$(CONFIG_UNEXPAND)  += expand.o
 lib-$(CONFIG_UNIQ)      += uniq.o
 lib-$(CONFIG_USLEEP)    += usleep.o
 lib-$(CONFIG_UUDECODE)  += uudecode.o