config: build: cleanup whitespace issue

In order to have it tidy.

Signed-off-by: Petr Štetiar <[email protected]>

config/Config-build.in

@@ -14,7 +14,7 @@ config EXPERIMENTAL
 	  positive and negative). But do so only if you know how to
 	  recover your device in case of flashing potentially non-working
 	  firmware.
-	
+
 	  If you plan to use this build in production, say NO!
 
 menu "Global build settings"