Rename Key.keyLabel attribute to KeySpec

Change-Id: Ida48cd9bdbc01fefad651a005084262c0f46c41c
diff --git a/java/res/xml/key_period.xml b/java/res/xml/key_period.xml
index 838db25..edb4f94 100644
--- a/java/res/xml/key_period.xml
+++ b/java/res/xml/key_period.xml
@@ -39,7 +39,7 @@
         </case>
         <default>
             <Key
-                latin:keyLabel="!text/keylabel_for_period"
+                latin:keySpec="!text/keylabel_for_period"
                 latin:keyHintLabel="!text/keyhintlabel_for_period"
                 latin:keyLabelFlags="hasPopupHint|hasShiftedLetterHint"
                 latin:moreKeys="!text/more_keys_for_period"