* test suite fixes for link=static default
* emscripten renovation
* inherit from clang toolset
* update for 'new' fastcomp backend
* exceptions support
* dynamic linking support
* pthread support
* run-tests launcher via nodejs
This adds exclusions for toolsets that use response files for some
commands. Mostly it ignores the generated rsp files.
But also adds a special arg_file value to the MockProgram for future
use for possible content checking.
Various restructure of test framework handling of paths to avoid duplicate path editing which caused failed tests. Adjust many tests to deal with added subdirectories in build outputs now that toolset requirements are active.
Additional implementation notes:
- internal worker project.load-jamfile() rule now resets the current project when done
- project.use() no longer needs to reset the current project since project.load-jamfile() does that now
[SVN r79874]
