Windows package is missing files

[larsbergstrom]

The Windows package (seen here: https://download.servo.org/nightly/windows/servo-latest.tar.gz) is missing some contents:

1. servo.exe is not packaged

2. there is a runservo.sh instead of runservo.cmd or runservo.bat

We plan to switch to an MSI (see #11967), but it'd be nice to just have a working package of some form for right now.

[ghost]

What should I need to be installed to run runservo.sh on Win 7 64bit?

[ghost]

First try:
`$ cd c:\servo

$ dir
build resources runservo.sh

$ sh runservo.sh
runservo.sh: line 2: ./servo: No such file or directory
`

[Croydon]

This is done.