v0.12.11 cluster-disconnect-race failure on Win7

[gibfahn]

The test simple/test-cluster-disconnect-race fails consistently for me on Windows 7.

Test introduced: #5153
Test fixed for windows in V4: Issue = #4450, PR = #4457

Based on that discussion, it looks like the test should be changed to simply skip on Windows. However, copying that fix gives a syntax error

const common = require('../common');
^^^^^
SyntaxError: Use of const in strict mode.

• Version: v0.12.11
• Platform: Windows 7 32 and 64 bit

Test failure:

python tools/test.py --mode=release --progress=tap simple/test-cluster-disconnect-race
1..1
not ok 1 - test-cluster-disconnect-race.js
#events.js:85
#      throw er; // Unhandled 'error' event
#            ^
#Error: write EPIPE
#    at exports._errnoException (util.js:746:11)
#    at ChildProcess.target._send (child_process.js:487:28)
#    at ChildProcess.target.send (child_process.js:419:12)
#    at sendHelper (cluster.js:679:8)
#    at send (cluster.js:515:5)
#    at Worker.disconnect (cluster.js:422:5)
#    at Worker.<anonymous> (C:\gib\code\node_debugging\node\test\simple\test-cluster-disconnect-race.js:22:13)
#    at Worker.<anonymous> (C:\gib\code\node_debugging\node\test\common.js:245:15)
#    at Worker.emit (events.js:110:17)
#    at ChildProcess.emit (events.js:110:17)
  ---
  duration_ms: 0.732
  ...

[gibfahn]

I also tried adding these lines (from the V4 fix) to the test, but I'm still getting the EPIPE error.

if (common.isWindows) {
  console.log('1..0 # Skipped: This test does not apply to Windows.');
  return;
}

[rvagg]

/cc @nodejs/testing

@gibm on v0.12 we don't have a common.isWindows so you can simply replace that with process.platform === 'win32'. Would you mind submitting a pull request against v0.12-staging?