Update Buck to newest version
Update Buck to newest version

The new Buck version fixed severe performance degradation (>5 seconds)
on no-op build: [1], [2].

* [1] https://github.com/facebook/buck/issues/604
* [2] https://github.com/facebook/buck/pull/609

Change-Id: I4ab1316a056a94019d06901798e36dd5d8968d7b

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