runtime: disable TestSegv panic check on darwin, illumos, solaris

CL 339990 made this test more strict, exposing pre-existing issues on
these OSes. Skip for now until they can be resolved.

Updates #49182

Change-Id: I3ac400dcd21b801bf4ab4eeb630e23b5c66ba563
Reviewed-on: https://go-review.googlesource.com/c/go/+/359254
Trust: Michael Pratt <[email protected]>
Run-TryBot: Michael Pratt <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>
Reviewed-by: Bryan C. Mills <[email protected]>
TryBot-Result: Go Bot <[email protected]>

Author: prattmic

src/runtime/crash_cgo_test.go

@@ -625,10 +625,18 @@ func TestSegv(t *testing.T) {
 			if !strings.Contains(got, want) {
 				t.Errorf("did not see %q in output", want)
 			}
+
 			// No runtime errors like "runtime: unknown pc".
-			nowant := "runtime: "
-			if strings.Contains(got, nowant) {
-				t.Errorf("unexpectedly saw %q in output", want)
+			switch runtime.GOOS {
+			case "darwin", "illumos", "solaris":
+				// TODO(golang.org/issue/49182): Skip, runtime
+				// throws while attempting to generate
+				// traceback.
+			default:
+				nowant := "runtime: "
+				if strings.Contains(got, nowant) {
+					t.Errorf("unexpectedly saw %q in output", nowant)
+				}
 			}
 		})
 	}