Changes

Bug 1219: Use Win32 API for test PE exe, not console
Previous test PE exe, commit 0ebc5398fa20d23214a37dc4930a1fa1617293c7, 
was a console exe. A console exe opens a new console window if not being
launched from one.
New test PE exe is produced w/ '-mwindows', i.e. for Win32 API w/o a
console.