Fix comments in XML files

Change-Id: Id0a69f98297d6a827006c6c4fe1304a197381f82
diff --git a/java/res/xml/rowkeys_khmer3.xml b/java/res/xml/rowkeys_khmer3.xml
index 7a2efa7..5e6d01f 100644
--- a/java/res/xml/rowkeys_khmer3.xml
+++ b/java/res/xml/rowkeys_khmer3.xml
@@ -46,7 +46,7 @@
                 latin:keySpec="អ"
                 latin:keyLabelFlags="fontNormal" />
             <!-- U+17C7: "ះ" KHMER SIGN REAHMUK
-                 U+17C8: "ៈ" KHMER SIGN YUUKALEAPINTU;-->
+                 U+17C8: "ៈ" KHMER SIGN YUUKALEAPINTU -->
             <Key
                 latin:keySpec="&#x17C7;"
                 latin:keyHintLabel="&#x17C8;"