www/node: Update 10.3.0 -> 10.4.0

https://nodejs.org/en/blog/release/v10.4.0/

Remove files/patch-deps_v8_src_base_cpu.cc, which has been applied
upstream and is no longer necessary (as reported in PR 228779). Other
patches have been refreshed as needed with make makepatch.

PR: 228779
Reported by: Sylvain Garrigues <sylvain@sylvaingarrigues.com>
Sponsored by: Miles AS