Replace write method when generating SVG file
Replace write method when generating SVG file

This method using echo may cause conflicts when using " or ' in a FBP file,
Besides the nodejs write method is more realiable.

Signed-off-by: Bruno Bottazzini <c92d71c55f49bd220e26b4af231350d119acce9e@intel.com>

solettaproject/soletta-dev-app,brunobottazzini/soletta-dev-app,solettaproject/soletta-dev-app,solettaproject/soletta-dev-app,brunobottazzini/soletta-dev-app,brunobottazzini/soletta-dev-app