Convert configs/stm32f4discovery/nxlines to use Kconfig tool

git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5320 42af7a65-404d-4744-a932-0658087f49c3

apps/examples/README.txt

@@ -941,8 +941,6 @@ examplex/nxlines
 
   The following configuration options can be selected:
 
-    CONFIG_EXAMPLES_NXLINES_BUILTIN -- Build the NXLINES example as a "built-in"
-      that can be executed from the NSH command line    
     CONFIG_EXAMPLES_NXLINES_VPLANE -- The plane to select from the frame-
       buffer driver for use in the test.  Default: 0
     CONFIG_EXAMPLES_NXLINES_DEVNO - The LCD device to select from the LCD
@@ -980,6 +978,9 @@ examplex/nxlines
       FAR struct fb_vtable_s *up_nxdrvinit(unsigned int devno);
       #endif
 
+    CONFIG_NSH_BUILTIN_APPS - Build the NX lines examples as an NSH built-in
+      function.
+
 examples/nxtext
 ^^^^^^^^^^^^^^^