process: refactor internal/process.js export style

PR-URL: https://github.com/nodejs/node/pull/12644
Reviewed-By: Brian White <mscdex@mscdex.net>

lib/internal/process.js

@@ -9,16 +9,6 @@ function lazyConstants() {
   return _lazyConstants;
 }
 
-exports.setup_cpuUsage = setup_cpuUsage;
-exports.setup_hrtime = setup_hrtime;
-exports.setupMemoryUsage = setupMemoryUsage;
-exports.setupConfig = setupConfig;
-exports.setupKillAndExit = setupKillAndExit;
-exports.setupSignalHandlers = setupSignalHandlers;
-exports.setupChannel = setupChannel;
-exports.setupRawDebug = setupRawDebug;
-
-
 const assert = process.assert = function(x, msg) {
   if (!x) throw new Error(msg || 'assertion error');
 };
@@ -267,3 +257,14 @@ function setupRawDebug() {
     rawDebug(format.apply(null, arguments));
   };
 }
+
+module.exports = {
+  setup_cpuUsage,
+  setup_hrtime,
+  setupMemoryUsage,
+  setupConfig,
+  setupKillAndExit,
+  setupSignalHandlers,
+  setupChannel,
+  setupRawDebug
+};