cmd/vet: fix test's dependence on perl
cmd/vet: fix test's dependence on perl

Change-Id: I774dbd4f90ef271a0969c3c8e65d145669312e3e
Reviewed-on: https://go-review.googlesource.com/22745
Run-TryBot: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>
Reviewed-by: Ross Light <dfccc06f14414bff5a59be7fc90abf4404b47fc8@google.com>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

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