lttng-tools: 2.10.2 -> 2.10.3

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/lttng-tools/versions.

These checks were done:

- built on NixOS
- ran `/nix/store/jfs54222qa6kkqs2vnf54p48ar94h6r1-lttng-tools-2.10.3/bin/lttng -V` and found version 2.10.3
- ran `/nix/store/jfs54222qa6kkqs2vnf54p48ar94h6r1-lttng-tools-2.10.3/bin/lttng --version` and found version 2.10.3
- ran `/nix/store/jfs54222qa6kkqs2vnf54p48ar94h6r1-lttng-tools-2.10.3/bin/lttng version` and found version 2.10.3
- ran `/nix/store/jfs54222qa6kkqs2vnf54p48ar94h6r1-lttng-tools-2.10.3/bin/lttng-crash -V` and found version 2.10.3
- ran `/nix/store/jfs54222qa6kkqs2vnf54p48ar94h6r1-lttng-tools-2.10.3/bin/lttng-crash --version` and found version 2.10.3
- found 2.10.3 with grep in /nix/store/jfs54222qa6kkqs2vnf54p48ar94h6r1-lttng-tools-2.10.3
- directory tree listing: https://gist.github.com/bf4b92fc08881141af11b0444ed15630