Small optimization to avoid allocating strings in the bind mount loop.
Small optimization to avoid allocating strings in the bind mount loop.

PiperOrigin-RevId: 157479936

bazelbuild/bazel,aehlig/bazel,werkt/bazel,dslomov/bazel,dslomov/bazel,damienmg/bazel,dropbox/bazel,aehlig/bazel,dropbox/bazel,snnn/bazel,aehlig/bazel,perezd/bazel,dropbox/bazel,bazelbuild/bazel,snnn/bazel,spxtr/bazel,variac/bazel,damienmg/bazel,meteorcloudy/bazel,werkt/bazel,meteorcloudy/bazel,dslomov/bazel,bazelbuild/bazel,werkt/bazel,damienmg/bazel,cushon/bazel,variac/bazel,perezd/bazel,dslomov/bazel,werkt/bazel,twitter-forks/bazel,meteorcloudy/bazel,variac/bazel,twitter-forks/bazel,dslomov/bazel-windows,safarmer/bazel,aehlig/bazel,dslomov/bazel,ulfjack/bazel,davidzchen/bazel,ulfjack/bazel,dropbox/bazel,spxtr/bazel,safarmer/bazel,ButterflyNetwork/bazel,bazelbuild/bazel,katre/bazel,akira-baruah/bazel,perezd/bazel,werkt/bazel,safarmer/bazel,davidzchen/bazel,meteorcloudy/bazel,meteorcloudy/bazel,variac/bazel,twitter-forks/bazel,ButterflyNetwork/bazel,damienmg/bazel,dslomov/bazel-windows,davidzchen/bazel,bazelbuild/bazel,spxtr/bazel,ButterflyNetwork/bazel,ulfjack/bazel,cushon/bazel,variac/bazel,damienmg/bazel,damienmg/bazel,katre/bazel,davidzchen/bazel,cushon/bazel,ButterflyNetwork/bazel,cushon/bazel,dropbox/bazel,werkt/bazel,ulfjack/bazel,perezd/bazel,aehlig/bazel,dslomov/bazel-windows,perezd/bazel,meteorcloudy/bazel,damienmg/bazel,cushon/bazel,katre/bazel,spxtr/bazel,dslomov/bazel,cushon/bazel,dslomov/bazel-windows,spxtr/bazel,akira-baruah/bazel,snnn/bazel,dropbox/bazel,katre/bazel,akira-baruah/bazel,safarmer/bazel,snnn/bazel,safarmer/bazel,bazelbuild/bazel,spxtr/bazel,katre/bazel,akira-baruah/bazel,twitter-forks/bazel,aehlig/bazel,snnn/bazel,snnn/bazel,davidzchen/bazel,twitter-forks/bazel,safarmer/bazel,ButterflyNetwork/bazel,davidzchen/bazel,dslomov/bazel-windows,dslomov/bazel-windows,ulfjack/bazel,aehlig/bazel,perezd/bazel,akira-baruah/bazel,snnn/bazel,twitter-forks/bazel,twitter-forks/bazel,ulfjack/bazel,variac/bazel,meteorcloudy/bazel,ulfjack/bazel,dslomov/bazel,ButterflyNetwork/bazel,katre/bazel,variac/bazel,spxtr/bazel,akira-baruah/bazel,perezd/bazel,davidzchen/bazel