update manifest-changelog with pxc-release properties
update manifest-changelog with pxc-release properties

[#157300422]

Signed-off-by: Aidan Obley <2667fa8e8663c9d9f622cbe0896041b5635a919f@pivotal.io>

cloudfoundry-incubator/cf-networking-release,cloudfoundry-incubator/cf-networking-release,cloudfoundry-incubator/cf-networking-release,cloudfoundry-incubator/cf-networking-release