"v8-inspector" in PACKAGECONFIG is ignored by configure

[tinoue]

Specifying "v8-inspector" in PACKAGECONFIG doesn't take effect.
In log.do_configure, there is a line "'v8_inspector': 'false',".

The reason is that the configure script turns the v8_inspector option to false
if with_intl=none (see below) - which is always set to "none" by "meta-nodejs/recipes-devtools/nodejs/nodejs_7.inc".

def configure_inspector(o):
  disable_inspector = (options.without_inspector or
                       options.with_intl in (None, 'none') or
                       options.without_ssl)
  o['variables']['v8_inspector'] = b(not disable_inspector)