Throw 'ImportError' if loading of native code failed.

Author: fangerer

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/ImpModuleBuiltins.java

@@ -41,7 +41,6 @@
 import static com.oracle.graal.python.nodes.SpecialAttributeNames.__FILE__;
 import static com.oracle.graal.python.runtime.exception.PythonErrorType.ImportError;
 import static com.oracle.graal.python.runtime.exception.PythonErrorType.NotImplementedError;
-import static com.oracle.graal.python.runtime.exception.PythonErrorType.SystemError;
 
 import java.io.IOException;
 import java.net.URI;
@@ -176,7 +175,7 @@ private Object loadDynamicModuleWithSpec(String name, String path, Node readNode
                 throw raise(ImportError, "cannot load %s");
             } catch (RuntimeException e) {
                 Throwable rootCaus = getRootCause(e);
-                throw raise(SystemError, "cannot load %s: %s", path, rootCaus.getMessage());
+                throw raise(ImportError, "cannot load %s: %s", path, rootCaus.getMessage());
             }
             TruffleObject pyinitFunc;
             try {