Rename some JS libraries to match their native counterparts. NFC

[sbc100]

No description provided.

[kripken]

Does this not affect e.g. ./emcc test/hello_world.c -lxlib.js? That works now but after this change it would need to be ./emcc test/hello_world.c -lX11.js

[sbc100]

Does this not affect e.g. ./emcc test/hello_world.c -lxlib.js? That works now but after this change it would need to be ./emcc test/hello_world.c -lX11.js

Yes, that is true. However, the standard way that this library was includes has always been via -lX11 (without the .js suffix). I dont think that folks are generally including system libraries via -lxlib.js, but I guess its worth considering more and at least adding a changelog entry.