Windows: Silenced protobuf compilation warnings.
Windows: Silenced protobuf compilation warnings.

Generated code from protobufs generate warnings on MSVC and other
compilers.  On MSVC, this clutters the final list of warnings with
many (mostly harmless) warnings that we cannot address, due to
the fact that protobuf code is generated code.

Review: https://reviews.apache.org/r/56675/

jpeach/mesos,yuquanshan/customizedMesos,verizonlabs/mesos,Gilbert88/mesos,zmalik/mesos,abudnik/mesos,jpeach/mesos,reneploetz/mesos,verizonlabs/mesos,Aman-Jain-14/customizedMesos,asamerh4/mesos,chhsia0/mesos,gsantovena/mesos,Aman-Jain-14/customizedMesos,andschwa/mesos,yuquanshan/customizedMesos,gsantovena/mesos,zmalik/mesos,Aman-Jain-14/customizedMesos,andschwa/mesos,zmalik/mesos,zmalik/mesos,kaysoky/mesos,craimbert/mesos,Aman-Jain-14/customizedMesos,verizonlabs/mesos,kaysoky/mesos,gsantovena/mesos,asamerh4/mesos,craimbert/mesos,neilconway/mesos,yuquanshan/customizedMesos,Gilbert88/mesos,andschwa/mesos,craimbert/mesos,craimbert/mesos,dforsyth/mesos,dforsyth/mesos,Gilbert88/mesos,zmalik/mesos,yuquanshan/customizedMesos,craimbert/mesos,yuquanshan/customizedMesos,Gilbert88/mesos,andschwa/mesos,kaysoky/mesos,andschwa/mesos,neilconway/mesos,verizonlabs/mesos,reneploetz/mesos,asamerh4/mesos,neilconway/mesos,andschwa/mesos,chhsia0/mesos,Aman-Jain-14/customizedMesos,neilconway/mesos,kaysoky/mesos,abudnik/mesos,asamerh4/mesos,abudnik/mesos,jpeach/mesos,abudnik/mesos,Aman-Jain-14/customizedMesos,verizonlabs/mesos,dforsyth/mesos,chhsia0/mesos,chhsia0/mesos,neilconway/mesos,neilconway/mesos,andschwa/mesos,asamerh4/mesos,Gilbert88/mesos,reneploetz/mesos,yuquanshan/customizedMesos,zmalik/mesos,asamerh4/mesos,reneploetz/mesos,gsantovena/mesos,craimbert/mesos,abudnik/mesos,kaysoky/mesos,asamerh4/mesos,abudnik/mesos,dforsyth/mesos,gsantovena/mesos,chhsia0/mesos,verizonlabs/mesos,reneploetz/mesos,verizonlabs/mesos,kaysoky/mesos,jpeach/mesos,zmalik/mesos,chhsia0/mesos,jpeach/mesos,kaysoky/mesos,dforsyth/mesos,abudnik/mesos,yuquanshan/customizedMesos,jpeach/mesos,Gilbert88/mesos,craimbert/mesos,Gilbert88/mesos,reneploetz/mesos,jpeach/mesos,reneploetz/mesos,gsantovena/mesos,dforsyth/mesos,neilconway/mesos,Aman-Jain-14/customizedMesos,gsantovena/mesos,chhsia0/mesos,dforsyth/mesos