[MERGE][1.15.1] use zdll on Windows to build chk_map extension

[Vincent Ladeuil]

>>>>> "martin" == Martin Pool <mbp at sourcefrog.net> writes:

    martin> 2009/6/4 Bundle Buggy <bundlebuggy at aaronbentley.com>:
    >> Bundle Buggy has detected this merge request.
    >> 
    >> For details, see:
    >> http://bundlebuggy.aaronbentley.com/project/bzr/request/%3Ch06a8r%24v7c%241%40ger.gmane.org%3E
    >> Project: Bazaar

    martin> This was merged to 1.15.

After 1.15.1 was released