contrib: fix implicit function decleration in win symbol check
contrib: fix implicit function decleration in win symbol check

```bash
test3.c: In function 'main':
test3.c:6:21: warning: implicit declaration of function 'CoFreeUnusedLibrariesEx' [-Wimplicit-function-declaration]
    6 |                     CoFreeUnusedLibrariesEx(0,0);
```

anditto/bitcoin,namecoin/namecoin-core,Xekyo/bitcoin,GroestlCoin/bitcoin,fujicoin/fujicoin,namecoin/namecore,fanquake/bitcoin,Xekyo/bitcoin,fanquake/bitcoin,bitcoin/bitcoin,Xekyo/bitcoin,jamesob/bitcoin,dscotese/bitcoin,sstone/bitcoin,anditto/bitcoin,lateminer/bitcoin,particl/particl-core,bitcoinsSG/bitcoin,fujicoin/fujicoin,fanquake/bitcoin,jlopp/statoshi,andreaskern/bitcoin,jambolo/bitcoin,ajtowns/bitcoin,Xekyo/bitcoin,domob1812/bitcoin,GroestlCoin/bitcoin,achow101/bitcoin,jlopp/statoshi,jamesob/bitcoin,andreaskern/bitcoin,GroestlCoin/bitcoin,mruddy/bitcoin,tecnovert/particl-core,namecoin/namecore,domob1812/bitcoin,tecnovert/particl-core,mruddy/bitcoin,GroestlCoin/GroestlCoin,jambolo/bitcoin,anditto/bitcoin,bitcoinsSG/bitcoin,domob1812/bitcoin,AkioNak/bitcoin,andreaskern/bitcoin,andreaskern/bitcoin,andreaskern/bitcoin,domob1812/bitcoin,sstone/bitcoin,dscotese/bitcoin,bitcoin/bitcoin,tecnovert/particl-core,jamesob/bitcoin,Xekyo/bitcoin,fujicoin/fujicoin,fujicoin/fujicoin,kallewoof/bitcoin,instagibbs/bitcoin,namecoin/namecore,lateminer/bitcoin,particl/particl-core,lateminer/bitcoin,AkioNak/bitcoin,bitcoinsSG/bitcoin,GroestlCoin/GroestlCoin,jambolo/bitcoin,sstone/bitcoin,sipsorcery/bitcoin,instagibbs/bitcoin,namecoin/namecoin-core,ajtowns/bitcoin,ajtowns/bitcoin,sipsorcery/bitcoin,dscotese/bitcoin,ajtowns/bitcoin,fanquake/bitcoin,jambolo/bitcoin,mruddy/bitcoin,anditto/bitcoin,domob1812/bitcoin,namecoin/namecoin-core,instagibbs/bitcoin,lateminer/bitcoin,dscotese/bitcoin,dscotese/bitcoin,particl/particl-core,anditto/bitcoin,particl/particl-core,sstone/bitcoin,GroestlCoin/GroestlCoin,tecnovert/particl-core,namecoin/namecore,jlopp/statoshi,ajtowns/bitcoin,kallewoof/bitcoin,namecoin/namecoin-core,particl/particl-core,jamesob/bitcoin,instagibbs/bitcoin,GroestlCoin/GroestlCoin,Xekyo/bitcoin,anditto/bitcoin,AkioNak/bitcoin,GroestlCoin/GroestlCoin,lateminer/bitcoin,sipsorcery/bitcoin,namecoin/namecoin-core,fanquake/bitcoin,AkioNak/bitcoin,kallewoof/bitcoin,GroestlCoin/bitcoin,fujicoin/fujicoin,tecnovert/particl-core,AkioNak/bitcoin,kallewoof/bitcoin,jlopp/statoshi,bitcoinsSG/bitcoin,fujicoin/fujicoin,jambolo/bitcoin,namecoin/namecore,jamesob/bitcoin,dscotese/bitcoin,fanquake/bitcoin,jlopp/statoshi,tecnovert/particl-core,particl/particl-core,jlopp/statoshi,sipsorcery/bitcoin,kallewoof/bitcoin,sipsorcery/bitcoin,bitcoin/bitcoin,domob1812/bitcoin,instagibbs/bitcoin,achow101/bitcoin,sstone/bitcoin,namecoin/namecoin-core,mruddy/bitcoin,GroestlCoin/bitcoin,AkioNak/bitcoin,achow101/bitcoin,sipsorcery/bitcoin,bitcoin/bitcoin,namecoin/namecore,instagibbs/bitcoin,GroestlCoin/GroestlCoin,mruddy/bitcoin,sstone/bitcoin,andreaskern/bitcoin,bitcoinsSG/bitcoin,GroestlCoin/bitcoin,kallewoof/bitcoin,achow101/bitcoin,achow101/bitcoin,jamesob/bitcoin,lateminer/bitcoin,ajtowns/bitcoin,mruddy/bitcoin,bitcoin/bitcoin,achow101/bitcoin,bitcoinsSG/bitcoin,bitcoin/bitcoin,jambolo/bitcoin