mark Linux-specific configuration options

PLATFORM_LINUX is used as a dependency for applets or features
which require Linux-specific interfaces.

Signed-off-by: Jeremie Koenig <jk@jk.fr.eu.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

miscutils/conspy.c

@@ -17,6 +17,7 @@
 //config:config CONSPY
 //config:	bool "conspy"
 //config:	default n
+//config:	depends on PLATFORM_LINUX
 //config:	help
 //config:	  A text-mode VNC like program for Linux virtual terminals.
 //config:	  example:  conspy NUM      shared access to console num