title: go tool pprof can't set binary path for local libraries
body: <p>The have tried to take a pprof dump of a part of our server code that we are trying to optimize. I'm not using the <code>net/http/pprof</code>, rather relying on <code>runtime/pprof</code>. My whole setup works correctly and I'm able to use the pprof dump on the server machine.</p>
  
  <p>However when I <code>scp</code> the pprof dump to my local machine - in order to use <code>web</code> since I don't want to install graphviz on my servers, pprof starts showing me this warning:</p>
  
  <pre><code>Local symbolization failed for contacts: open /home/deploy/amigo/bin/contacts: no such file or directory
  Some binary filenames not available. Symbolization may be incomplete.
  Try setting PPROF_BINARY_PATH to the search path for local binaries.
  File: contacts
  Type: cpu
  Time: May 8, 2019 at 3:27pm (IST)
  Duration: 1.06s, Total samples = 1.07s (101.25%)
  Entering interactive mode (type "help" for commands, "o" for options)
  </code></pre>
  
  <p>I copied the original <code>bin</code> from the server and try setting the <code>PPROF_BINARY_PATH</code>. But it still doesn't help. What am I doing wrong here? </p>