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

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

coreutils/Config.src

@@ -295,11 +295,11 @@ config FEATURE_INSTALL_LONG_OPTIONS
 	help
 	  Support long options for the install applet.
 
-config LENGTH
-	bool "length"
-	default y
-	help
-	  length is used to print out the length of a specified string.
+####config LENGTH
+####	bool "length"
+####	default y
+####	help
+####	  length is used to print out the length of a specified string.
 
 config LN
 	bool "ln"

coreutils/Kbuild.src

@@ -39,7 +39,7 @@ lib-$(CONFIG_HEAD)      += head.o
 lib-$(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