disable length applet. ${#var} and echo -n "$var" | wc -c are portable equivalents

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/coreutils/Kbuild.src b/coreutils/Kbuild.src
index 4ea0fa5..6a41c83 100644
--- a/coreutils/Kbuild.src
+++ b/coreutils/Kbuild.src
@@ -39,7 +39,7 @@
 lib-$(CONFIG_HOSTID)    += hostid.o
 lib-$(CONFIG_ID)        += id.o
 lib-$(CONFIG_INSTALL)   += install.o
-lib-$(CONFIG_LENGTH)    += length.o
+#lib-$(CONFIG_LENGTH)    += length.o
 lib-$(CONFIG_LN)        += ln.o
 lib-$(CONFIG_LOGNAME)   += logname.o
 lib-$(CONFIG_LS)        += ls.o