config: fix typo in Global build settings menu

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@44163 3c298f89-4303-0410-b956-a3cf2f4a3e73

config/Config-build.in

@@ -251,7 +251,7 @@ menu "Global build settings"
 	endchoice
 
 	choice
-		prompt "Enable buffer-overflows detction (FORTIFY_SOURCE)"
+		prompt "Enable buffer-overflows detection (FORTIFY_SOURCE)"
 		help
 		  Enable the _FORTIFY_SOURCE macro which introduces additional
 		  checks to detect buffer-overflows in the following standard library