vcpkg/NOTICE.txt, branch 2020.04

vcpkg/NOTICE.txt, branch 2020.04 Forked from https://github.com/microsoft/vcpkg Add third party notices -- copied from chakracore (#7403) 2019-07-24T18:07:55+00:00 nicole mazzuca mazzucan@outlook.com 2019-07-24T18:07:55+00:00 77b03ef1991c39394de7c892fc392bb0a52b9d2a Add third party notices -- copied from chakracore

Add third party notices -- copied from chakracore