runtime: use windows.NewLazySystemDLL in mksyscall_windows.go
runtime: use windows.NewLazySystemDLL in mksyscall_windows.go

Change-Id: Ie4c4ff4167ee45ae93a8b764fb6197f402e7994d
Reviewed-on: https://go-review.googlesource.com/21593
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

suncycheng/go,CAFxX/go,vanloswang/go,golang/go,suncycheng/go,cloudflare/go,ImJasonH/go,codestation/go,vanloswang/go,CAFxX/go,cloudflare/go,vsekhar/elastic-go,ImJasonH/go,theif519/go,akutz/go,akutz/go,4ad/go,Cofyc/go,goodlang/good,Cofyc/go,josharian/go,codestation/go,ImJasonH/go,linux-on-ibm-z/go,polyverse-security/go,momchil-velikov/go,suncycheng/go,vanloswang/go,momchil-velikov/go,Cofyc/go,derekmarcotte/go,polyverse-security/go,suncycheng/go,theif519/go,suncycheng/go,akutz/go,Cofyc/go,codestation/go,ImJasonH/go,vanloswang/go,Cofyc/go,CAFxX/go,golang/go,goodlang/good,polyverse-security/go,josharian/go,vsekhar/elastic-go,ganboing/go-esx,linux-on-ibm-z/go,4ad/go,derekmarcotte/go,codestation/go,vsekhar/elastic-go,4ad/go,polyverse-security/go,theif519/go,josharian/go,golang/go,josharian/go,momchil-velikov/go,codestation/go,ganboing/go-esx,ImJasonH/go,vanloswang/go,ImJasonH/go,goodlang/good,momchil-velikov/go,goodlang/good,linux-on-ibm-z/go,goodlang/good,derekmarcotte/go,golang/go,vsekhar/elastic-go,polyverse-security/go,codestation/go,vsekhar/elastic-go,akutz/go,4ad/go,nawawi/go,vsekhar/elastic-go,ganboing/go-esx,Cofyc/go,vsekhar/elastic-go,linux-on-ibm-z/go,derekmarcotte/go,CAFxX/go,4ad/go,akutz/go,josharian/go,christopher-henderson/Go,suncycheng/go,cloudflare/go,theif519/go,derekmarcotte/go,linux-on-ibm-z/go,cloudflare/go,linux-on-ibm-z/go,golang/go,josharian/go,momchil-velikov/go,derekmarcotte/go,ImJasonH/go,ganboing/go-esx,vsekhar/elastic-go,CAFxX/go,CAFxX/go,ganboing/go-esx,momchil-velikov/go,cloudflare/go,4ad/go,CAFxX/go,ganboing/go-esx,goodlang/good,4ad/go,polyverse-security/go,vanloswang/go,akutz/go,codestation/go,cloudflare/go,nawawi/go,polyverse-security/go,vanloswang/go,theif519/go,nawawi/go,golang/go,golang/go,josharian/go,goodlang/good,akutz/go,nawawi/go,ganboing/go-esx,codestation/go,polyverse-security/go,momchil-velikov/go,theif519/go,momchil-velikov/go,nawawi/go,nawawi/go,theif519/go,goodlang/good,nawawi/go,theif519/go,josharian/go,ganboing/go-esx,cloudflare/go,4ad/go,vanloswang/go,derekmarcotte/go,akutz/go,linux-on-ibm-z/go,suncycheng/go,nawawi/go,cloudflare/go,Cofyc/go,golang/go,ImJasonH/go,CAFxX/go,derekmarcotte/go,suncycheng/go,Cofyc/go,linux-on-ibm-z/go