[node-fs] use process.cwd as the fs root
[node-fs] use process.cwd as the fs root

Signed-off-by: Anton Kosiakov <93305abb4fd19156b2366e8285c439930563a735@typefox.io>

lmcgupe/theia,epatpol/theia-1,epatpol/theia-1,hexa00/theia,lmcgupe/theia,epatpol/theia-1,hexa00/theia