cmd/cgo: use _Complex in rewritten Go code too
cmd/cgo: use _Complex in rewritten Go code too

Followup to CL 17716, which updated cgo's boilerplate prologue code to
use standard C's _Complex instead of GCC's __complex extension.

Change-Id: I74f29b0cc3d13cab2853441cafbfe77853bba4f9
Reviewed-on: https://go-review.googlesource.com/17820
Run-TryBot: Matthew Dempsky <e56ac2c500064424afac424d4b5e53bd0570a731@google.com>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

derekmarcotte/go,Endika/go,suncycheng/go,codestation/go,momchil-velikov/go,suncycheng/go,derekmarcotte/go,4ad/go,binarycrusader/go,cyberroadie/go,momchil-velikov/go,sndnvaps/go,cloudflare/go,akutz/go,cloudflare/go,derekmarcotte/go,linux-on-ibm-z/go,mwhudson/go,akutz/go,4ad/go,miolini/go,miolini/go,CAFxX/go,goodlang/good,golang/go,cloudflare/go,josharian/go,ganboing/go-esx,polyverse-security/go,CAFxX/go,josharian/go,vsekhar/elastic-go,deft-code/go,vanloswang/go,derekmarcotte/go,Cofyc/go,vsekhar/elastic-go,roth1002/go,cloudflare/go,akutz/go,polyverse-security/go,vanloswang/go,derekmarcotte/go,polyverse-security/go,suncycheng/go,suncycheng/go,cyberroadie/go,cyberroadie/go,binarycrusader/go,vsekhar/elastic-go,vsekhar/elastic-go,ganboing/go-esx,Cofyc/go,CAFxX/go,ganboing/go-esx,ImJasonH/go,4ad/go,akutz/go,vanloswang/go,kim-racktop/go,kim-racktop/go,josharian/go,mwhudson/go,momchil-velikov/go,theif519/go,codestation/go,nawawi/go,4ad/go,Samurais/go,CAFxX/go,Cofyc/go,suncycheng/go,roth1002/go,vsekhar/elastic-go,nawawi/go,theif519/go,suncycheng/go,golang/go,akutz/go,roth1002/go,ImJasonH/go,theif519/go,vanloswang/go,miolini/go,theif519/go,deft-code/go,miolini/go,ganboing/go-esx,vsekhar/elastic-go,roth1002/go,binarycrusader/go,mwhudson/go,mwhudson/go,Endika/go,golang/go,linux-on-ibm-z/go,Endika/go,theif519/go,nawawi/go,miolini/go,golang/go,codestation/go,vanloswang/go,golang/go,Samurais/go,derekmarcotte/go,Cofyc/go,ganboing/go-esx,josharian/go,theif519/go,4ad/go,4ad/go,ImJasonH/go,sndnvaps/go,sndnvaps/go,akutz/go,vsekhar/elastic-go,goodlang/good,goodlang/good,deft-code/go,Cofyc/go,momchil-velikov/go,momchil-velikov/go,binarycrusader/go,Endika/go,vsekhar/elastic-go,akutz/go,sndnvaps/go,polyverse-security/go,cyberroadie/go,codestation/go,vanloswang/go,sndnvaps/go,codestation/go,momchil-velikov/go,derekmarcotte/go,mwhudson/go,Endika/go,binarycrusader/go,CAFxX/go,cloudflare/go,nawawi/go,mwhudson/go,ImJasonH/go,kim-racktop/go,sndnvaps/go,cloudflare/go,polyverse-security/go,CAFxX/go,linux-on-ibm-z/go,Samurais/go,cyberroadie/go,josharian/go,suncycheng/go,linux-on-ibm-z/go,kim-racktop/go,ganboing/go-esx,ganboing/go-esx,deft-code/go,deft-code/go,roth1002/go,golang/go,nawawi/go,cyberroadie/go,theif519/go,Endika/go,goodlang/good,nawawi/go,josharian/go,deft-code/go,4ad/go,kim-racktop/go,vanloswang/go,momchil-velikov/go,roth1002/go,ImJasonH/go,CAFxX/go,miolini/go,goodlang/good,nawawi/go,josharian/go,Cofyc/go,kim-racktop/go,goodlang/good,Cofyc/go,linux-on-ibm-z/go,codestation/go,polyverse-security/go,Cofyc/go,akutz/go,golang/go,polyverse-security/go,codestation/go,cyberroadie/go,kim-racktop/go,sndnvaps/go,Samurais/go,ImJasonH/go,miolini/go,codestation/go,4ad/go,ImJasonH/go,polyverse-security/go,Endika/go,deft-code/go,christopher-henderson/Go,linux-on-ibm-z/go,roth1002/go,suncycheng/go,sndnvaps/go,ganboing/go-esx,linux-on-ibm-z/go,derekmarcotte/go,binarycrusader/go,Samurais/go,mwhudson/go,goodlang/good,theif519/go,ImJasonH/go,mwhudson/go,josharian/go,cloudflare/go,roth1002/go,momchil-velikov/go,Samurais/go,cloudflare/go,linux-on-ibm-z/go,Samurais/go,golang/go,CAFxX/go,deft-code/go,cyberroadie/go,nawawi/go,goodlang/good,Endika/go,binarycrusader/go,Samurais/go,kim-racktop/go,miolini/go,binarycrusader/go,vanloswang/go