cmd/compile: convert getdyn int arg to bool
cmd/compile: convert getdyn int arg to bool

Passes toolstash -cmp.

Change-Id: I5b893b8b82b358534fd85542f05e3aa7e666bcd3
Reviewed-on: https://go-review.googlesource.com/26752
Run-TryBot: Josh Bleecher Snyder <cdc248cc4d32e4fbfe04e45228163bcecd48a0b9@gmail.com>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: David Crawshaw <a2f0bf29257797dd66800b4fbb9945c3e216c004@golang.org>
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

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