Input: add missing exports to fix modular build

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/lib/kobject.c b/lib/kobject.c
index 1699eb9..7dd5c0e 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -119,6 +119,7 @@
 
 	return path;
 }
+EXPORT_SYMBOL_GPL(kobject_get_path);
 
 /**
  *	kobject_init - initialize object.