Copy dbghelp.dll and symsrv.dll to bin directory
Copy dbghelp.dll and symsrv.dll to bin directory

RetrieveSymbols.exe won't run unless these DLLs are in the same
directory as it. This fixes that glitch and makes RetrieveSymbols
run more reliably.

I would have made this fix earlier but the email reminding me to do it
got stuck in my Junk e-mail folder for seven months.

google/UIforETW,ariccio/UIforETW,ariccio/UIforETW,ariccio/UIforETW,google/UIforETW,google/UIforETW,google/UIforETW,ariccio/UIforETW