Update oat version to 053.

Oat version in class OatHeader had increased to 052, 
but commit 2bcb3b228bc418bcc7fdc3d58d0a0da422a0b6d5
(changeID I8cef1c6cc9cb2faa052167a3437e81b4c2cbefa7)
changed it back to 045.

Change-Id: I5bf7b995c9d99a536f6356d9fd5b5e746a933f2e
Signed-off-by: Chenfu Bao <emailwrong@gmail.com>
Merge "Update oat version to 053."