busybox: clarify BR2_PACKAGE_BUSYBOX_FULLINSTALL description

Explicitly explain what the (default) install target does, so people who
don't know busybox details understands what the option does.

Notice: Busybox can be configured to create hard links or shell wrappers
instead, but by default symlinks are used.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/busybox/Config.in

@@ -43,7 +43,7 @@ config BR2_BUSYBOX_VERSION
 	default "1.18.1"	if BR2_BUSYBOX_VERSION_1_18_X
 
 config BR2_PACKAGE_BUSYBOX_FULLINSTALL
-	bool "Run BusyBox's own full installation"
+	bool "Install symlinks to BusyBox applets"
 	default y
 	help
 	  If you want to run BusyBox's own full install for the