Update the README file to refer to the EDL rather than BSD license.

The wordings of the two license are the same. This change is there
to make this file consistent with the LICENSE file.

Change-Id: I7c9d7a8f3622dd4099ca311af3dd032034bf56c0

README

@@ -1,6 +1,7 @@
             == Java GIT ==
 
-This package is licensed under the BSD.
+This package is licensed under the EDL (Eclipse Distribution
+License).
 
   org.eclipse.jgit/
 
@@ -9,7 +10,7 @@ This package is licensed under the BSD.
     to exercise the library.  The library provides functions to
     read and write a GIT formatted repository.
 
-    All portions of jgit are covered by the BSD.  Absolutely no GPL,
+    All portions of jgit are covered by the EDL. Absolutely no GPL,
     LGPL or EPL contributions are accepted within this package.
 
   org.eclipse.jgit.test/