Build NDA files as object libraries, with alternate compile flags.
Build NDA files as object libraries, with alternate compile flags.

Should allow safely building Debug runtime builds of OSVR-RenderManager
even with the NDA code and with distributing symbols - the NDA code shouldn't
have any symbols for it.

sensics/OSVR-RenderManager,sensics/OSVR-RenderManager,sensics/OSVR-RenderManager