Tweak _NT_SYMBOL_PATH message to be runnable
Tweak _NT_SYMBOL_PATH message to be runnable

I sometimes copy the UIforETW _NT_SYMBOL_PATH message to my command
prompt so that I can set _NT_SYMBOL_PATH appropriately. This just
changes it so I don't have to edit it as much - I just prepent 'set '.

google/UIforETW,ariccio/UIforETW,google/UIforETW,google/UIforETW,mwinterb/UIforETW,mwinterb/UIforETW,MikeMarcin/UIforETW,MikeMarcin/UIforETW,mwinterb/UIforETW,MikeMarcin/UIforETW,ariccio/UIforETW,ariccio/UIforETW,google/UIforETW,ariccio/UIforETW