doc/go1.7: add runtime.KeepAlive
doc/go1.7: add runtime.KeepAlive

Update #13347.

Change-Id: I04bf317ed409478a859355f833d4a5e30db2b9c9
Reviewed-on: https://go-review.googlesource.com/23226
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

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