Fix sed command to work on OS X and Linux
Fix sed command to work on OS X and Linux

This was using -i to replace WORKSPACE in-place, but OS X requires -i to take an
argument ('' in this case) and Linux expects `sed -i''` and OS X expects
`sed -i ''`.

--
MOS_MIGRATED_REVID=106530804

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