Change to compiler (vs. Windows) test for export defines.
Change to compiler (vs. Windows) test for export defines.

swansontec/libbitcoin,libmetrocoin/libmetrocoin-consensus,libmetrocoin/libmetrocoin-consensus,swansontec/libbitcoin,swansontec/libbitcoin,libmetrocoin/libmetrocoin-consensus,GroestlCoin/libgroestlcoin,libtetcoin/libtetcoin-consensus,libmetrocoin/libmetrocoin-consensus,libmetrocoin/libmetrocoin-consensus,swansontec/libbitcoin,GroestlCoin/libgroestlcoin,Airbitz/libbitcoin,libtetcoin/libtetcoin-consensus,Airbitz/libbitcoin,libtetcoin/libtetcoin-consensus,GroestlCoin/libgroestlcoin,libtetcoin/libtetcoin-consensus,Airbitz/libbitcoin,libtetcoin/libtetcoin-consensus,Airbitz/libbitcoin,GroestlCoin/libgroestlcoin