Copyright for rust-libssh2-sys source package in Yangtze V1.0

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: rust-libssh2-sys
Source: 
#
# Please double check copyright with the licensecheck(1) command.

Files:     .cargo_vcs_info.json
           .gitattributes
           Cargo.toml
           Cargo.toml.orig
           build.rs
           lib.rs
Copyright: __NO_COPYRIGHT_NOR_LICENSE__
License:   __NO_COPYRIGHT_NOR_LICENSE__

#----------------------------------------------------------------------------
# Files marked as NO_LICENSE_TEXT_FOUND may be covered by the following
# license/copyright files.