kconfig: move lxdialog to scripts/kconfig/lxdialog

The only lxdialog user i kconfig - for menuconfig.
So move it to reflect this.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/scripts/Makefile b/scripts/Makefile
index 67763ee..6f6b48f 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -19,4 +19,4 @@
 subdir-$(CONFIG_MODULES)     += mod
 
 # Let clean descend into subdirs
-subdir-	+= basic lxdialog kconfig package
+subdir-	+= basic kconfig package