* clr: Adjust call to ICmdBuffer::CmdCopyMemoryToImage for PAL >= 955
PAL starting versino 955 adds a new argument to
ICmdBuffer::CmdCopyMemoryToImage. Adjust teh callsite to account
fort his.
* clr: Handle new GpuUtil::TraceSessionState cases for PAL >= 939
Starting PAL API version 939, GpuUtil::TraceSessionState changes its
possible values. Adjust for it.
* clr: require PAL version 954
Bump the PAL required vesion to 954, as this is required for proper
debugger support.