package/nodejs: remove support for coffeescript

package/nodejs: remove support for coffeescript

BR2_PACKAGE_NODEJS_MODULES_COFFEESCRIPT has been deprecated.  To continue
using add coffee-script to BR2_PACKAGE_NODEJS_MODULES_ADDITIONAL.

Fixes:
http://autobuild.buildroot.org/results/0e4fb1a615ab9654ad2b4b1274a34583e02aa44e
http://autobuild.buildroot.org/results/fabf2f5f25c62be615fd09e59e6ad9234385645f
http://autobuild.buildroot.org/results/8653d78a190df1e691f52a911d8153104c46226b
http://autobuild.buildroot.org/results/2fc7e5e64ad6ced02a47e5062176d316eed0f43b

Signed-off-by: Martin Bark <martin@barkynet.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>