This commit renames the '--fetch-dev' option into '--npm-dev' as it is a
npm only option.
(From OE-Core rev: 2b75cc848ceebee4067788a621299bfd5fb62231)
Signed-off-by: Jean-Marie LEMETAYER <jean-marie.lemetayer@savoirfairelinux.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>