This makes the js batched test runner cooperate with emrun.
The runner sends back the output and exit messages to emrun to inform it
about the test execution state.
The code is based on emrun_postjs.js from the emsdk.
Change-Id: I758f2c185797f4000810eb4314423eebc1c5d457
Reviewed-by: David Skoland <david.skoland@qt.io>
A driver application has been prepared in js for running batched tests.
There is a convenient public API defined for reading the current test
status & subscribing to changes thereof.
The solution is modular - the module qwasmjsruntime can be used for any
wasm instantiation, e.g. in the next iteration of qtloader.
Change-Id: I00df88188c46a42f86d431285ca96d60d89b3f05
Pick-to: 6.4
Reviewed-by: David Skoland <david.skoland@qt.io>
