consolidate target_files metadata into one key-value file

Instead of separate files for recovery api version, tool extensions,
and mkyaffs2 options, put those all in the generic key-value file.

Change-Id: Ib642311632844d52e4895fd4747093fc7e86232d
diff --git a/tools/releasetools/edify_generator.py b/tools/releasetools/edify_generator.py
index 3334b43..390bd4b 100644
--- a/tools/releasetools/edify_generator.py
+++ b/tools/releasetools/edify_generator.py
@@ -31,7 +31,7 @@
     """Make a temporary script object whose commands can latter be
     appended to the parent script with AppendScript().  Used when the
     caller wants to generate script commands out-of-order."""
-    x = EdifyGenerator(self.version)
+    x = EdifyGenerator(self.version, self.info)
     x.mounts = self.mounts
     return x