Bug 1267057 - Fix spelling of errorAddPermission. r=Ratty a=Ratty typo fix

suite/common/permissions/cookieViewer.js

@@ -493,7 +493,7 @@ function setCookiePermissions(action) {
     var uri = ioService.newURI(url, null, null);
   } catch (e) {
     // show an error if URI can not be constructed or adding it failed
-    window.alert(cookieBundle.getString("errorAddPermisison"));
+    window.alert(cookieBundle.getString("errorAddPermission"));
     return;
   }
   // only allow a few schemes here

suite/locales/en-US/chrome/common/permissions/cookieViewer.properties

@@ -15,7 +15,7 @@ forSecureOnly=Encrypted connections only
 forAnyConnection=Any type of connection
 expireAtEndOfSession=At end of session
 allowedURLSchemes=Check the entered url. Also you can only add permissions for http or https schemes
-errorAddPermisison=Permission for site could not be added
+errorAddPermission=Permission for site could not be added
 deleteAllCookies=Are you sure you want to delete all the cookies?
 deleteAllCookiesTitle=Remove All Cookies
 deleteAllCookiesYes=&Remove