Make javac ant options configurable.

Change-Id: I303acdb4fc8de6ba5d8de7c18e020e97fe01e3de
diff --git a/changes.txt b/changes.txt
index 4fe7cd3..603c3e6 100644
--- a/changes.txt
+++ b/changes.txt
@@ -7,6 +7,8 @@
   the Android Manifest.
   "ant debug" will automatically insert debuggable==true, while "ant release"
   will not.
+- new overridable Ant javac properties: java.encoding, java.source, and java.target
+  (default to "ascii", "1.5" and "1.5")
 
 
 Revision 7: