Generate KeyboardLabelsSet from donottranslate-more-keys.xml

This change introduces makelabel tool that reads all languages'
donottranslate-more-keys and generate KeyboardLabelsSet.java source
file. The makelabel command must be invoked prior to compile LatinIME.

Change-Id: I7515c7919c535e30f9c80a37bdc831d0f682cd43
diff --git a/java/res/xml-sw600dp/rowkeys_symbols3.xml b/java/res/xml-sw600dp/rowkeys_symbols3.xml
index 9293352..536ac05 100644
--- a/java/res/xml-sw600dp/rowkeys_symbols3.xml
+++ b/java/res/xml-sw600dp/rowkeys_symbols3.xml
@@ -41,11 +41,11 @@
         </default>
     </switch>
     <Key
-        latin:keyLabel="@string/keylabel_for_symbols_semicolon"
-        latin:moreKeys="@string/more_keys_for_symbols_semicolon" />
+        latin:keyLabel="!label/keylabel_for_symbols_semicolon"
+        latin:moreKeys="!label/more_keys_for_symbols_semicolon" />
     <Key
-        latin:keyLabel="@string/keylabel_for_comma"
-        latin:moreKeys="@string/more_keys_for_comma" />
+        latin:keyLabel="!label/keylabel_for_comma"
+        latin:moreKeys="!label/more_keys_for_comma" />
     <Key
         latin:keyLabel="." />
     <!-- U+00A1: "¡" INVERTED EXCLAMATION MARK -->
@@ -53,6 +53,6 @@
         latin:keyLabel="!"
         latin:moreKeys="&#x00A1;" />
     <Key
-        latin:keyLabel="@string/keylabel_for_symbols_question"
-        latin:moreKeys="@string/more_keys_for_symbols_question" />
+        latin:keyLabel="!label/keylabel_for_symbols_question"
+        latin:moreKeys="!label/more_keys_for_symbols_question" />
 </merge>