Temporarily work around cygwin /cygdrive/c pathname in AUTOBUILD.

scripts/packages-formatter.py

@@ -33,6 +33,8 @@ import subprocess
 _autobuild=os.getenv('AUTOBUILD',
                     'autobuild' if not ( sys.platform == 'win32' or sys.platform == 'cygwin')
                     else 'autobuild.cmd')
+# HACK: temporarily work around cygwin /cygdrive/c madness
+_autobuild = re.sub(r"^/cygdrive/(.)/", r"\1:/", _autobuild)
 
 pkg_line=re.compile('^([\w-]+):\s+(.*)$')