[PATCH 0/2] MR738: tests/test-driver Miscelaneous improvements.

[Francisco Casas (＠fcasas)]

Some times the test can be aborted for reasons others than failed assertions, such as segmentation faults or reaching unreacheable code.

To speed up noticing these problems, the `[SIGABRT]` and `[SIGSEGV]` tags are printed on the corresponding exit codes.

Also, "reached unreachable code" lines are also detected and printed with an [AF] tag.

An error may look like this:

```
FAIL: tests/hlsl/some-test.shader_test
    (SM4.0-SM5.1)OpenGL/SPIR-V 43[XF] 79[XF] 126[XF] 149[XF] 159[XF]
    [AF] vkd3d/libs/vkd3d-shader/hlsl.c:246: Aborting, reached unreachable code.
    [SIGABRT] Aborted (core dumped)
```