Make it possible to select "sh" and "bash" aliases without selecting ash or hush

The same can be done for msh, but we are probably better off just deleting it
in a next versio or two.

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

make_single_applets.sh

@@ -26,6 +26,7 @@ allno="$cfg"
 for app in $apps; do
 	allno="`echo "$allno" | sed "s/^CONFIG_${app}=y\$/# CONFIG_${app} is not set/"`"
 done
+#echo "$allno" >.config_allno
 
 # Turn on each applet individually and build single-applet executable
 fail=0
@@ -37,6 +38,16 @@ for app in $apps; do
 	mv .config .config.SV
 	echo "CONFIG_${app}=y" >.config
 	echo "$allno" | sed "/^# CONFIG_${app} is not set\$/d" >>.config
+
+	if test x"${app}" != x"SH_IS_ASH"; then
+		# $allno has all choices for "sh" aliasing at off.
+		# "sh" aliasing defaults to "ash", not none.
+		# without this fix, "make oldconfig" sets it wrong,
+		# resulting in NUM_APPLETS = 2
+		sed '/CONFIG_SH_IS_NONE/d' -i .config
+		echo "CONFIG_SH_IS_NONE=y" >>.config
+	fi
+
 	if ! yes '' | make oldconfig >busybox_make_${app}.log 2>&1; then
 		: $((fail++))
 		echo "Config error for ${app}"