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Part of #154.
Adds a table of 13 known Linux Mono builds and attaches with each build's measured offsets when a game runs one.
A build is recognized by its build ID, a value the linker writes into the binary that differs for every build. Unity's Mono library has one up to 2019.4. Newer libraries have none, so those builds are recognized by the ID of
UnityPlayer.so. The player's ID is used only when the Mono library has no ID at all, never because the lookup missed, so a modified Mono cannot match a normal build's entry.Some Linux games cannot attach at all today.
Version::detectneeds either a file namedlibmono.soor aUnityPlayer.soto read the Unity version from. Games that shiplibmonobdwgc-2.0.soand no player library have neither, so attaching fails. 2018.4 is one of them. The build lookup runs first, so those games attach.The measurements also fill in the Linux offset tables, which games nobody has measured fall back on. Those tables were shared with Mac, so they are split first and only the Linux copy takes the measurements.
cargo test --all-featuresruns the suite. The new tests cover the lookup, the build ID parser, which binary names a build and when, and the version tables agreeing with the measured builds.Depends on #153.