Prepare build system for gpgme-js and dist it
* configure.ac: Add js as language. * lang/Makefile.am: Add js as dist language. * lang/js/BrowserTestExtension/Makefile.am, lang/js/DemoExtension/Makefile.am, lang/js/Makefile.am, lang/js/src/Makefile.am: Populate EXTRA_DIST variables.
There is no actual build done yet as there seems to be
no way to build it with debian stable tools. This needs
clarification.