deepin.deepin-screenshot: fix FHS hard coded path

[romildo]

Motivation for this change

Fix the use of the fixPath bash helper function.

    # Usage:
    #
    #   fixPath <parent dir> <path> <files>
    #
    # replaces occurences of <path> by <parent_dir><path> in <files>
    # removing /usr from the start of <path> if present

About packaging deepin for NixOS: #59023

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nix-review --run "nix-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Assured whether relevant documentation is up to date
• Fits CONTRIBUTING.md.

[worldofpeace]

I like the debug output you mentioned in #59242 (comment)

[romildo]

I like the debug output you mentioned in #59242 (comment)

I will add it back then.

[worldofpeace]

Sorry about that. Thanks 👍