lib: build node inspect into node

Include the relevant files from `deps/node-inspect` in the compiled
`node` binary and make `node inspect` work like `node-inspect`.

PR-URL: #10187
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: addaleax

lib/internal/bootstrap_node.js

@@ -76,6 +76,10 @@
       // Start the debugger agent
       NativeModule.require('_debugger').start();
 
+    } else if (process.argv[1] === 'inspect') {
+      // Start the debugger agent
+      NativeModule.require('node-inspect/lib/_inspect').start();
+
     } else if (process.argv[1] === '--remote_debugging_server') {
       // Start the debugging server
       NativeModule.require('internal/inspector/remote_debugging_server');

node.gyp

@@ -112,6 +112,9 @@
       'deps/v8/tools/tickprocessor.js',
       'deps/v8/tools/SourceMap.js',
       'deps/v8/tools/tickprocessor-driver.js',
+      'deps/node-inspect/lib/_inspect.js',
+      'deps/node-inspect/lib/internal/inspect_client.js',
+      'deps/node-inspect/lib/internal/inspect_repl.js',
     ],
     'conditions': [
       [ 'node_shared=="true"', {