test: correct spelling of 'childProcess'

Per: nodejs/node-v0.x-archive#8715

Cleans up a minor spelling error in two tests.

PR-URL: nodejs#2389
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Roman Reiss <me@silverwind.io>

Author: muddletoes

test/sequential/test-stdin-from-file.js

@@ -2,7 +2,7 @@
 var common = require('../common');
 var assert = require('assert');
 var join = require('path').join;
-var childProccess = require('child_process');
+var childProcess = require('child_process');
 var fs = require('fs');
 
 var stdoutScript = join(common.fixturesDir, 'echo-close-check.js');
@@ -32,7 +32,7 @@ try {
 
 fs.writeFileSync(tmpFile, string);
 
-childProccess.exec(cmd, function(err, stdout, stderr) {
+childProcess.exec(cmd, function(err, stdout, stderr) {
   fs.unlinkSync(tmpFile);
 
   if (err) throw err;

test/sequential/test-stdout-to-file.js

@@ -2,7 +2,7 @@
 var common = require('../common');
 var assert = require('assert');
 var path = require('path');
-var childProccess = require('child_process');
+var childProcess = require('child_process');
 var fs = require('fs');
 
 var scriptString = path.join(common.fixturesDir, 'print-chars.js');
@@ -26,7 +26,7 @@ function test(size, useBuffer, cb) {
 
   common.print(size + ' chars to ' + tmpFile + '...');
 
-  childProccess.exec(cmd, function(err) {
+  childProcess.exec(cmd, function(err) {
     if (err) throw err;
 
     console.log('done!');