Added com.google.common.util.concurrent.Runnables to Guava.
	Change on 2014/11/18 by tball <tball@google.com>
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=80208832
Log environment variables at start of build.
	Change on 2014/11/18 by tball <tball@google.com>
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=80227148
Create builddefs/BUILD during running make dist.
	Change on 2014/11/18 by tball <tball@google.com>
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=80227239
Automated g4 rollback.

*** Reason for rollback ***

Issues mixing Java objects in native containers, like NSDictionary.

*** Original change description ***

Issue 423: fixed String.hashCode() to match JRE results.

***
	Change on 2014/11/18 by tball <tball@google.com>
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=80229801
Merge branch 'master' of https://github.com/google/j2objc