Tests: Fix requiring core dump

test_regress/driver.pl

@@ -2391,6 +2391,7 @@ sub files_identical {
                 !/^- [^\n]+\n/
                     && !/^- [a-z.0-9]+:\d+:[^\n]+\n/
                     && !/^-node:/
+                    && !/^Aborted \(core dumped\)/
                     && !/^dot [^\n]+\n/
                     && !/^In file: .*\/sc_.*:\d+/
                     && !/^libgcov.*/

test_regress/t/t_constraint_nosolver_bad.out

@@ -5,4 +5,3 @@ Process::open: execvp(someimaginarysolver): No such file or directory
 
 %Error: t/t_constraint.v:23: Verilog $stop
 Aborting...
-Aborted (core dumped)