Escape "#" sign in XML file

Change-Id: Icd38abc4a0454ca949613d8c4bb528758cd990d8
diff --git a/java/res/xml-sw600dp/rowkeys_pcqwerty1.xml b/java/res/xml-sw600dp/rowkeys_pcqwerty1.xml
index d486b9d..b11bbba 100644
--- a/java/res/xml-sw600dp/rowkeys_pcqwerty1.xml
+++ b/java/res/xml-sw600dp/rowkeys_pcqwerty1.xml
@@ -52,8 +52,8 @@
                 latin:keyStyle="hasShiftedLetterHintStyle" />
             <Key
                 latin:keyLabel="3"
-                latin:keyHintLabel="#"
-                latin:additionalMoreKeys="#"
+                latin:keyHintLabel="\#"
+                latin:additionalMoreKeys="\#"
                 latin:moreKeys="!text/more_keys_for_symbols_3"
                 latin:keyStyle="hasShiftedLetterHintStyle" />
             <Key