Debug crash in libdatadog

Author: gleocadie

tracer/build/_build/Build.Steps.cs

@@ -1986,6 +1986,7 @@ void RunWindowsIisIntegrationTests(Project project)
                        .EnableNoBuild()
                        .SetIsDebugRun(isDebugRun)
                        .SetProcessEnvironmentVariable("MonitoringHomeDirectory", MonitoringHomeDirectory)
+                       .SetProcessEnvironmentVariable("RUST_BACKTRACE", "1")
                        .SetLogsDirectory(TestLogsDirectory)
                        .EnableTrxLogOutput(GetResultsDirectory(project))
                        .WithDatadogLogger());