support IBM Advance Toolchain

[ThinkOpenly]

The IBM Advance Toolchain can be used to compile application with very recent compiler versions and run applications with very recent versions of libraries which are themselves compiled with those very recent compiler versions. This linking binds the application to use the libraries that come with the Advance Toolchain.

splat needs to trace relevant events (SDTs) in those libraries. Unfortunately, current versions of the Advance Toolchain don't provide those SDTs (advancetoolchain/advance-toolchain#946). This will eventually be fixed, so support should be to splat now.