buildroot

nodejs: bump 6.x version to 6.11.0

6.11.0 is the latest release in the LTS series, fixing a number of issues:

https://nodejs.org/en/blog/release/v6.11.0/

Building without openssl is broken in 6.11.0, so add an upstream patch to
fix that.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>