"For a library, complete source code means all the source code for all modules it contains, plus any associated interface definition files, plus the scripts used to control compilation and installation of the library."
They don't. Well, they might, but not an iOS binary. There's Makefiles for Android and (I believe) the desktop, but nothing setup for use with the iPhone SDK.
For example, the latest iOS JavaScriptCore release (4.2, http://www.opensource.apple.com/source/JavaScriptCore/JavaSc...) has no Xcode files like the one you linked does.
I haven't read the LGPL lately, but is that a violation? Do they have to provide enough information to build your own copy?