Added Cflags to pkg-config file.
Added Cflags to pkg-config file.

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