Disable debuginfo-tests for non-native configurations

[probinson]

Summary

This requires the host triple to match the default target triple, in order to run debuginfo-tests.
It's possible this is too restrictive, but offhand it seems like a reasonable starting point.

[probinson]

The new file goes in the debuginfo-tests directory. It's a separate project so that's probably not obvious from the diff.

[aprantl]

This seems reasonable to me, thanks!
When you commit this, could you please double-check that the tests are still running on the green dragon builders? I'll also keep an eye on them.

[probinson]

r312803. Forgot to put the tag in the commit message....

[probinson]

In D37604#864187, @aprantl wrote:

This seems reasonable to me, thanks!
When you commit this, could you please double-check that the tests are still running on the green dragon builders? I'll also keep an eye on them.

I was able to google "llvm green dragon" and find what looks like the right page, but I kind of would have expected to see a link on the llvm.org front page? Am I just not looking in the right place?

lit.local.cfg

+# debuginfo-tests are not expected to pass in a cross-compilation setup.
+if 'native' not in config.available_features:
+    config.unsupported = True