procd: make old button hotplug rules work until all packages are migrated

Signed-off-by: John Crispin <[email protected]>

SVN-Revision: 37336

package/system/procd/files/hotplug.json

@@ -70,7 +70,7 @@
 	],
 	[ "if",
 		[ "eq", "SUBSYSTEM",
-			[ "net", "input", "usb", "ieee1394", "block", "atm", "zaptel", "tty" ]
+			[ "net", "input", "usb", "ieee1394", "block", "atm", "zaptel", "tty", "button" ]
 		],
 		[ "exec", "/sbin/hotplug-call", "%SUBSYSTEM%" ]
 	],