Protobuf include directory

[abice]

The current build only copies the protoc/bin/protoc binary from the protobuf release. This doesn't allow for any protoc compilation that requires the standard google.protobuf includes. Changed the copy function to copy everything to /usr/local which includes the bin directory and the include directory.

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[abice]

I signed it!

[googlebot]

CLAs look good, thanks!

[nathanielmanistaatgoogle]

Two commits to change one line? Huh? Just squash commits (and conform to these guidelines with your commit message).

[dfawley]

Thanks for the fix!