do not extract translatable="false" strings from Android resource

Change-Id: Id00ce654b99426c771b647e0ae6be02bfdc24359

l10ntools/source/stringmerge.cxx

@@ -67,6 +67,9 @@ void StringParser::Extract( const OString& rPOFile )
         pCurrent; pCurrent = pCurrent->next)
     {
         if (!xmlStrcmp(pCurrent->name, (const xmlChar*)("string")))
+        {
+            xmlChar* pTranslatable = xmlGetProp(pCurrent, (const xmlChar*)("translatable"));
+            if (xmlStrcmp(pTranslatable, (const xmlChar*)("false")))
             {
                 xmlChar* pID = xmlGetProp(pCurrent, (const xmlChar*)("name"));
                 xmlChar* pText = xmlNodeGetContent(pCurrent);
@@ -80,6 +83,8 @@ void StringParser::Extract( const OString& rPOFile )
                 xmlFree( pID );
                 xmlFree( pText );
             }
+            xmlFree( pTranslatable );
+        }
     }
 
     xmlFreeDoc( m_pSource );