Remove /W3 from compiler_flag from MSVC CROSSTOOL
Remove /W3 from compiler_flag from MSVC CROSSTOOL

The default warning level will become /W1 which only display severe warnings.

https://msdn.microsoft.com/en-us/library/thxezb7y.aspx

RELNOTES: None
PiperOrigin-RevId: 156972872

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