Bug 1602735 - Update SeaMonkey website for 2.53.1 Beta 1 release - Add pt-BR r=me

lib/downloads_table_2531.en.xml

@@ -139,6 +139,16 @@
     <cell locale="pl" class="download-linux" platform="linux64" content="Download" />
     <cell locale="pl" class="download-linux" platform="linux" content="Download" />
   </language>
+  <language id="pt-BR">
+    <cell name="Portuguese (Brazilian)" />
+    <cell lang="pt-BR" native="Português (do Brasil)" />
+    <cell version="ver" />
+    <cell locale="pt-BR" class="download-win" platform="win64" content="Download" />
+    <cell locale="pt-BR" class="download-win" platform="win" content="Download" />
+    <cell locale="pt-BR" class="download-mac" platform="osx" content="Download" />
+    <cell locale="pt-BR" class="download-linux" platform="linux64" content="Download" />
+    <cell locale="pt-BR" class="download-linux" platform="linux" content="Download" />
+  </language>
   <language id="pt-PT">
     <cell name="Portuguese (Portugal)" />
     <cell lang="pt-PT" native="Português (Europeu)" />