Copyright for rust-plotters-backend source package in Yangtze V1.0

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

Files:     .cargo_vcs_info.json
           Cargo.toml
           Cargo.toml.orig
           README.md
           src/lib.rs
           src/rasterizer/circle.rs
           src/rasterizer/line.rs
           src/rasterizer/mod.rs
           src/rasterizer/path.rs
           src/rasterizer/polygon.rs
           src/rasterizer/rect.rs
           src/style.rs
           src/text.rs
Copyright: __NO_COPYRIGHT_NOR_LICENSE__
License:   __NO_COPYRIGHT_NOR_LICENSE__

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