cmd/cgo: don't track same node twice in guessKinds
cmd/cgo: don't track same node twice in guessKinds

Change-Id: Ib2c1490a42e3485913a05a0b2fecdcc425d42871
Reviewed-on: https://go-review.googlesource.com/36083
Run-TryBot: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

codestation/go,akutz/go,ImJasonH/go,linux-on-ibm-z/go,nawawi/go,josharian/go,Cofyc/go,nawawi/go,codestation/go,cloudflare/go,cloudflare/go,polyverse-security/go,josharian/go,derekmarcotte/go,ImJasonH/go,ImJasonH/go,polyverse-security/go,cloudflare/go,golang/go,vsekhar/elastic-go,Cofyc/go,golang/go,Cofyc/go,codestation/go,linux-on-ibm-z/go,akutz/go,linux-on-ibm-z/go,polyverse-security/go,josharian/go,codestation/go,vsekhar/elastic-go,ImJasonH/go,akutz/go,golang/go,codestation/go,codestation/go,ImJasonH/go,josharian/go,nawawi/go,nawawi/go,nawawi/go,cloudflare/go,ImJasonH/go,akutz/go,nawawi/go,vsekhar/elastic-go,nawawi/go,golang/go,linux-on-ibm-z/go,derekmarcotte/go,Cofyc/go,CAFxX/go,linux-on-ibm-z/go,polyverse-security/go,derekmarcotte/go,Cofyc/go,cloudflare/go,golang/go,vsekhar/elastic-go,josharian/go,CAFxX/go,ImJasonH/go,linux-on-ibm-z/go,Cofyc/go,akutz/go,ImJasonH/go,linux-on-ibm-z/go,codestation/go,akutz/go,derekmarcotte/go,Cofyc/go,vsekhar/elastic-go,derekmarcotte/go,akutz/go,cloudflare/go,Cofyc/go,golang/go,CAFxX/go,cloudflare/go,polyverse-security/go,CAFxX/go,derekmarcotte/go,derekmarcotte/go,vsekhar/elastic-go,polyverse-security/go,polyverse-security/go,CAFxX/go,josharian/go,josharian/go,CAFxX/go,josharian/go,vsekhar/elastic-go,nawawi/go,CAFxX/go,cloudflare/go,derekmarcotte/go,akutz/go,linux-on-ibm-z/go,vsekhar/elastic-go,CAFxX/go,golang/go,golang/go,christopher-henderson/Go,polyverse-security/go,codestation/go