Restructure XFST sources

Change-Id: I92c899a124caf724cc782cd168a96252e81ce832
diff --git a/src/xml.xfst b/src/xml.xfst
index 1c7421f..06e247d 100644
--- a/src/xml.xfst
+++ b/src/xml.xfst
@@ -1,6 +1,6 @@
 ! XML rule
 define XMLns [AsciiLetter [AsciiLetter|Digit|%-]* (%: AsciiLetter [AsciiLetter|Digit|%-]*)] .o. Caseinsensitive;
-read regex [
+define XML [
   "<" [
       [
         XMLns