pkg/proc: be resilient to the upcoming sys.PtraceLwpInfo changes #3284
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As part of golang/go#58387 work (CL 469835), the signature of sys.PtraceLwpInfo will change to accept *sys.PtraceLwpInfoStruct instead of an uintptr. As a compatibility measure, update ptraceGetLwpInfo to work with both old and new sys.PtraceLwpInfo signatures.