I have noticed that when a native coreclr stuff compilation failed, the build was continuing, tried to run corerun that was not produced and failed. Then it tried to generate packages for coreclr and failed again. But it still continued building further stuff, finally failing when trying to crossgen something else.

We should fail the build as soon as coreclr build failed.

Here is an example, see lines 3129 and on:
https://dev.azure.com/dnceng/public/_build/results?buildId=587189&view=logs&j=da3b6fae-2b9c-515e-f961-941b19f305e4&t=e211c71e-116d-5222-99f8-68e08c58ca66