Snapshot cygwin1-20181129.dll.xz seems broken

[Mark Geisert]

After substituting in that DLL on my system, 'net start <anything>' 
results in a spinning cygrunsrv; trying to open a Cygwin Terminal results 
in a spinning mintty.  After reverting, a fresh DLL build following 'git 
pull' results in a new DLL with the same issue.

The previous cygwin1-20181126.dll.xz seems to work fine in these 
scenarios.

..mark