Add dependency checking to the Far install.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2279 6f19259b-4bc3-4df7-8a09-765794883524

Tools/Python/XmlRoutines.py

@@ -73,6 +73,13 @@ def XmlParseFile (FileName):
   except:
     return xml.dom.minidom.parseString('<empty/>')
 
+def XmlParseString (Str):
+  """Parse an XML string into a DOM and return the DOM."""
+  try:
+    return xml.dom.minidom.parseString(Str)
+  except:
+    return xml.dom.minidom.parseString('<empty/>')
+
 def XmlParseFileSection (FileName, Tag):
   """Parse a section of an XML file into a DOM(Document Object Model) and return the DOM."""
   try: