Provide pg_config in dea staging path

Change-Id: Ifa9e74aa5d00e6a6c77f76b63ad3f1e79c92cb62
Bump dea_next

git shortlog 75b188a..9fcb860
Jennifer Hickey and Maria Shaldibina (1):
      Enable usage of buildpacks that require /app on compile
Merge git://github.com/cloudfoundry/cf-release