Fix skcms-Linux bot, once and for all

Make sure to install a specific version of node. Otherwise, we get a
floating version (that comes with the emsdk install), and the script
keeps breaking.

Change-Id: Iac1e92d788373107710102b3288eb6ea8c0ee1ee
Reviewed-on: https://skia-review.googlesource.com/c/skcms/+/726963
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
1 file changed