runtime: add Frames example
runtime: add Frames example

Based on sample code from iant.

Fixes #18788.

Change-Id: I6bb33ed05af2538fbde42ddcac629280ef7c00a6
Reviewed-on: https://go-review.googlesource.com/36892
Run-TryBot: Josh Bleecher Snyder <cdc248cc4d32e4fbfe04e45228163bcecd48a0b9@gmail.com>
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

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