rename overload_extendc testcase

Examples/test-suite/scilab/overload_extend2_runme.sci

@@ -0,0 +1,15 @@
+exec("swigtest.start", -1);
+
+try
+    x = new_Foo();
+catch
+    swigtesterror();
+end
+if Foo_test(x, 1) <> 1 then swigtesterror(); end
+if Foo_test(x, "Hello swig!") <> 2 then swigtesterror(); end
+if Foo_test(x, 2, 3) <> 3 then swigtesterror(); end
+if Foo_test(x, x) <> 30 then swigtesterror(); end
+if Foo_test(x, x, 4) <> 24 then swigtesterror(); end
+if Foo_test(x, x, 4, 5) <> 9 then swigtesterror(); end
+
+exec("swigtest.quit", -1);