Copyright for spirv-tools source package in Huanghe V3.0

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: spirv-tools
Source: https://github.com/KhronosGroup/SPIRV-Tools

Files: *
Copyright: 2016-2017 Google Inc.
           2015-2017 The Khronos Group Inc.
           2017 LunarG Inc.
           2016-2018 Valve Corporation
           2017-2018 Pierre Moreau
License: Apache-2.0

Files: debian/*
Copyright: 2018 Timo Aaltonen 
License: Apache-2.0

License: Apache-2.0
 On Debian systems, the complete text of the Apache License version 2.0
 can be found in "/usr/share/common-licenses/Apache-2.0".