Make sure the deletion event gets reported in the following scenario:
1. Watch a file.
2. The initial stat() goes okay.
3. Something deletes the watched file.
4. The second stat() fails with ENOENT.
The second stat() translates into the first 'change' event but a logic error
stopped it from getting emitted.
Fixes#4027.
A ReadStream constructed from an existing file descriptor failed to start
reading automatically. Avoids a userspace call to ReadStream.prototype._read().
With -e or --eval, require() can load module using relative path.
node -e 'require("./foo")'
But it can't load module from node_modules directory.
node -e 'require("foo")'
Fixes#1196.