doc: correct the number of changes to the language in go1.8.html
doc: correct the number of changes to the language in go1.8.html

And link it.

Change-Id: Ic0105468435299fb1638f86522f4f3ce417ec1c2
Reviewed-on: https://go-review.googlesource.com/33871
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

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