Store CFF names in UTF-8

We switched XML encoding from Latin-1 to UTF-8.  Adjust CFF
code.

Lib/fontTools/cffLib.py

@@ -672,6 +672,11 @@ class SimpleConverter:
 		return attrs["value"]
 
 class Latin1Converter(SimpleConverter):
+	def xmlWrite(self, xmlWriter, name, value, progress):
+		# Store as UTF-8
+		value = unicode(value, "latin-1").encode("utf-8")
+		xmlWriter.simpletag(name, value=value)
+		xmlWriter.newline()
 	def xmlRead(self, (name, attrs, content), parent):
 		s = unicode(attrs["value"], "utf-8")
 		return s.encode("latin-1")