Make subcommand completion in zsh work on Mac OS X
Make subcommand completion in zsh work on Mac OS X

Avoid depending on extended regexp of gawk

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Change-Id: I28a57c249c5b8078b410c365f51f400bcdc27997
Reviewed-on: https://bazel-review.googlesource.com/#/c/2240
MOS_MIGRATED_REVID=106877966

twitter-forks/bazel,UrbanCompass/bazel,kchodorow/bazel-1,Asana/bazel,kchodorow/bazel,rohitsaboo/bazel,kchodorow/bazel,davidzchen/bazel,mrdomino/bazel,cushon/bazel,mrdomino/bazel,dslomov/bazel-windows,twitter-forks/bazel,dslomov/bazel,kamalmarhubi/bazel,kchodorow/bazel,werkt/bazel,twitter-forks/bazel,hhclam/bazel,mrdomino/bazel,dslomov/bazel,hermione521/bazel,ulfjack/bazel,twitter-forks/bazel,perezd/bazel,bazelbuild/bazel,akira-baruah/bazel,UrbanCompass/bazel,snnn/bazel,variac/bazel,whuwxl/bazel,kchodorow/bazel,spxtr/bazel,mikelalcon/bazel,variac/bazel,kchodorow/bazel-1,rohitsaboo/bazel,akira-baruah/bazel,hermione521/bazel,dslomov/bazel-windows,snnn/bazel,aehlig/bazel,dslomov/bazel,meteorcloudy/bazel,dropbox/bazel,dinowernli/bazel,twitter-forks/bazel,juhalindfors/bazel-patches,mbrukman/bazel,perezd/bazel,ulfjack/bazel,cushon/bazel,dinowernli/bazel,mikelikespie/bazel,Asana/bazel,zhexuany/bazel,meteorcloudy/bazel,aehlig/bazel,variac/bazel,dslomov/bazel-windows,meteorcloudy/bazel,Asana/bazel,safarmer/bazel,damienmg/bazel,cushon/bazel,cushon/bazel,dropbox/bazel,mikelalcon/bazel,juhalindfors/bazel-patches,Digas29/bazel,werkt/bazel,mbrukman/bazel,katre/bazel,mikelalcon/bazel,safarmer/bazel,dslomov/bazel-windows,damienmg/bazel,bazelbuild/bazel,spxtr/bazel,zhexuany/bazel,bazelbuild/bazel,dslomov/bazel-windows,zhexuany/bazel,kchodorow/bazel,variac/bazel,damienmg/bazel,Digas29/bazel,spxtr/bazel,kamalmarhubi/bazel,ulfjack/bazel,dropbox/bazel,davidzchen/bazel,ButterflyNetwork/bazel,werkt/bazel,anupcshan/bazel,whuwxl/bazel,hermione521/bazel,LuminateWireless/bazel,abergmeier-dsfishlabs/bazel,rohitsaboo/bazel,rohitsaboo/bazel,hhclam/bazel,mbrukman/bazel,damienmg/bazel,abergmeier-dsfishlabs/bazel,katre/bazel,snnn/bazel,werkt/bazel,kamalmarhubi/bazel,juhalindfors/bazel-patches,kamalmarhubi/bazel,anupcshan/bazel,mikelikespie/bazel,mikelikespie/bazel,perezd/bazel,variac/bazel,mrdomino/bazel,safarmer/bazel,Asana/bazel,iamthearm/bazel,juhalindfors/bazel-patches,iamthearm/bazel,kamalmarhubi/bazel,dropbox/bazel,Digas29/bazel,akira-baruah/bazel,UrbanCompass/bazel,hermione521/bazel,Digas29/bazel,twitter-forks/bazel,anupcshan/bazel,meteorcloudy/bazel,aehlig/bazel,damienmg/bazel,perezd/bazel,whuwxl/bazel,safarmer/bazel,ButterflyNetwork/bazel,abergmeier-dsfishlabs/bazel,ulfjack/bazel,perezd/bazel,rohitsaboo/bazel,bazelbuild/bazel,iamthearm/bazel,katre/bazel,Digas29/bazel,dinowernli/bazel,zhexuany/bazel,hhclam/bazel,mbrukman/bazel,werkt/bazel,dslomov/bazel,snnn/bazel,mikelikespie/bazel,cushon/bazel,zhexuany/bazel,hhclam/bazel,mikelalcon/bazel,dslomov/bazel-windows,spxtr/bazel,hhclam/bazel,aehlig/bazel,davidzchen/bazel,kchodorow/bazel,Digas29/bazel,whuwxl/bazel,perezd/bazel,ButterflyNetwork/bazel,juhalindfors/bazel-patches,hhclam/bazel,anupcshan/bazel,snnn/bazel,mikelalcon/bazel,ButterflyNetwork/bazel,abergmeier-dsfishlabs/bazel,variac/bazel,safarmer/bazel,akira-baruah/bazel,mrdomino/bazel,ulfjack/bazel,aehlig/bazel,mikelalcon/bazel,spxtr/bazel,iamthearm/bazel,spxtr/bazel,Asana/bazel,UrbanCompass/bazel,damienmg/bazel,Asana/bazel,meteorcloudy/bazel,whuwxl/bazel,damienmg/bazel,juhalindfors/bazel-patches,bazelbuild/bazel,dslomov/bazel,hermione521/bazel,dslomov/bazel,kchodorow/bazel-1,katre/bazel,meteorcloudy/bazel,davidzchen/bazel,kchodorow/bazel-1,dinowernli/bazel,perezd/bazel,cushon/bazel,mikelikespie/bazel,ulfjack/bazel,mrdomino/bazel,werkt/bazel,davidzchen/bazel,snnn/bazel,dropbox/bazel,akira-baruah/bazel,katre/bazel,Asana/bazel,dinowernli/bazel,kchodorow/bazel-1,safarmer/bazel,ButterflyNetwork/bazel,kchodorow/bazel-1,hermione521/bazel,davidzchen/bazel,LuminateWireless/bazel,mikelikespie/bazel,ulfjack/bazel,spxtr/bazel,variac/bazel,juhalindfors/bazel-patches,aehlig/bazel,anupcshan/bazel,katre/bazel,davidzchen/bazel,UrbanCompass/bazel,abergmeier-dsfishlabs/bazel,dropbox/bazel,bazelbuild/bazel,aehlig/bazel,kamalmarhubi/bazel,kchodorow/bazel,LuminateWireless/bazel,LuminateWireless/bazel,rohitsaboo/bazel,zhexuany/bazel,mbrukman/bazel,mbrukman/bazel,dinowernli/bazel,iamthearm/bazel,LuminateWireless/bazel,twitter-forks/bazel,iamthearm/bazel,snnn/bazel,ButterflyNetwork/bazel,dslomov/bazel,UrbanCompass/bazel,LuminateWireless/bazel,meteorcloudy/bazel,whuwxl/bazel,akira-baruah/bazel,anupcshan/bazel,abergmeier-dsfishlabs/bazel