[Cocoa] clang static analyzer warns about object being autoreleased too many times in +[WKNSArray web_arrayWithImmutableArray:]
https://bugs.webkit.org/show_bug.cgi?id=123384

Reviewed by Mark Rowe.

* Shared/Cocoa/WKNSArray.h: Annotated -web_initWithImmutableArray: as an init method.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@158082 268f45cc-cd09-0410-ab3c-d52691b4dbfc