package: followup to previous commit.
package: don't bother with Emscripten tests at all.

They are slow to link and always failing anyway.
package: added NaCl Jenkins configuration.
package: seriously, this wasn't working at all.
package: there isn't anything to install for NaCl and Emscripten now.

Just checking that CMake step runs fine.
Merge branch 'master' into compatibility
package: using compatibility branch for NaCl.

The x86 toolchain has GCC 4.4, which requires compatibility branch.