nodejs: disable ssl2 and ssl3 when openssl is not built

The nodejs version 0.10.33 is compiled with SSLv2 and SSLv3 protocol
support by default so it fails to build if the package openssl was not
built.

To fix this build failure disable SSLv2 and SSLv3 protcol suppport if
the openssl package is not built.

Fixes:
  http://autobuild.buildroot.net/results/e1fb34818ff1167aa008b4011befb9fd14c81293
  http://autobuild.buildroot.net/results/8b72b0c311f2f7f7430aca5f7cca1f7d82d1c213
  http://autobuild.buildroot.net/results/e5f87dc635e0e6a6d1cc234529a433e12d810097
  http://autobuild.buildroot.net/results/3c4a5be556cfbd0d0e632757887ebc2f1de64bba



Signed-off-by: Fabio Porcedda <fabio.porcedda@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>