pbjs cannot install dependencies in VirtualBox shared folder

[Sunstradamus]

protobuf.js version: current

In a Vagrant VB linux guest on a windows host with shared/synced folders, npm cannot create symlinks. When first running pbjs, it then fails as it cannot install any dependencies that create symlinks in the install script.

Adding --no-bin-links to modInstall in cli/util.js on line 129 would resolve this problem.

[Sunstradamus]

Just want to point out that 114f7ea has reverted the changes in eb1b404