libmozjs-24-dev-dbgsym 24.2.0-3ubuntu2.1 (i386 binary) in ubuntu xenial

 SpiderMonkey is the code-name for the Mozilla's C++ implementation of
 JavaScript. It is intended to be embedded in other applications
 that provide host environments for JavaScript.
 .
 This package contains the header files and static library which is
 needed for developing Spidermonkey embedders.