Pau Farré

When cmake detects dwarf library (due incorrect initialization of `BACKWARD_LIBRARIES`) the interface target `Backward::Backward` generates an empy `INTERFACE_LINK_LIBRARIES` which causes all tests to fail at link time. Offending line: https://github.com/bombela/backward-cpp/blob/27349d0a751e8a0bc62d60c198972712020f34ac/BackwardConfig.cmake#L114...

Glow has a Trace infrastructure well documented here [Tracing.md](https://github.com/pytorch/glow/blob/master/docs/Tracing.md) and specified here [TraceEvents.h](https://github.com/pytorch/glow/blob/master/include/glow/ExecutionContext/TraceEvents.h). Some examples like [examples/resnet-runtime.cpp](https://github.com/pytorch/glow/blob/master/examples/resnet-runtime.cpp) and [examples/tracing-compare.cpp](https://github.com/pytorch/glow/blob/master/examples/tracing-compare.cpp) define a `--trace-path` flag to dump all traces to a file...