cmd/compile: remove excessive whitespace in needkeyupdate
cmd/compile: remove excessive whitespace in needkeyupdate

Passes toolstash-check.

Change-Id: I5309125e0da65a5f240e53472b1c911252f0a472
Reviewed-on: https://go-review.googlesource.com/41403
Run-TryBot: Josh Bleecher Snyder <cdc248cc4d32e4fbfe04e45228163bcecd48a0b9@gmail.com>
Reviewed-by: Matthew Dempsky <e56ac2c500064424afac424d4b5e53bd0570a731@google.com>

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