TOOLS-176 some project mo-docs builds are broken (can't use NODE_INSTALL until after makefile includes)
TOOLS-176 some project mo-docs builds are broken (can't use NODE_INSTALL until after makefile includes)

This was putting "/bin" at the front of the path, which resulted in
/bin/python (2.4 on the mo-docs server) being used for doc build
(restdown). This broken on 2.4 not having the core 'json' module.

joyent/registrar,joyent/registrar