Bug 40013: Add option do overwrite timestamp in extension version

            rename { 'manifest.json' }

            into extDir

            def values = ['version': rootProject.ext.config.componentsVersion + "." + new Date().format('MMddHHmmss')]

            def systemEnvBuildDate = System.getenv('MOZ_BUILD_DATE')

            // MOZ_BUILD_DATE is in the YYYYMMDDHHMMSS format. Thus, we only use a

            // substring of it if it is available.

            def values = ['version': rootProject.ext.config.componentsVersion + "." +

                          (systemEnvBuildDate != null ?

                           systemEnvBuildDate.substring(4) :

                           new Date().format('MMddHHmmss'))]

            inputs.properties(values)

            expand(values)

        }