*/*: update NGINX JavaScript 0.7.8 -> 0.7.9

Bump PORTREVISION for www/nginx-devel.

<ChangeLog>

*) Bugfix: fixed Fetch Response prototype reinitialization.

When at least one js_import directive was declared in both HTTP
and Stream, ngx.fetch() returned inapproriate response in Stream.
The bug was introduced in 0.7.7.

Core:

*) Bugfix: fixed String.prototype.replace(re) if re.exec() returns

non-flat array.

*) Bugfix: fixed Array.prototype.fill() when start object changes

"this".

*) Bugfix: fixed description for fs.mkdir() and fs.rmdir() methods.

*) Bugfix: fixed %TypedArray%.prototype.set(s) when s element changes

"this".

*) Bugfix: fixed Array.prototype.splice(s, d) when d resizes "this"

during evaluation.

*) Bugfix: fixed for-in loop with left and right hand side

expressions.

</ChangeLog>