Updates version number to 0.4.164010588.20170802.
Updates version number to 0.4.164010588.20170802.

Significant changes:
- macos_application, macos_command_line_application, and 
  macos_extension support.
- Set SDKRoot/DeploymentTarget based on platform.

--
PiperOrigin-RevId: 164016517
MOS_MIGRATED_REVID=164016517

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