windows msi: add npm dir to user PATH only
windows msi: add npm dir to user PATH only

The NPM folder is personal to the user. It shouldn't be added to the
system-wide path.

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node