package/nodejs: update python variable patch

Update 0003-Use-a-python-variable-instead-of-hardcoding-Python.patch
for v5.5.0 to include the js2c.py tool.

Fixes:
http://autobuild.buildroot.net/results/87e9bbbb36f7fe4868d238ef6a7b72eb8cca7052/
http://autobuild.buildroot.net/results/f748c0956f71a7857d5cc9ae7bfe3c14357a078a/



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