Disable by default the benchmark part of MatBSR tests because ctest runs them...

Disable by default the benchmark part of MatBSR tests because ctest runs them in parallel so the times are biased on VMs.

misc/test/src/C++/test_MatBSR.cpp.in

@@ -790,9 +790,13 @@ int main(int argc, char** argv)
 	test_getitem(*bmat);
 	test_tosparse(*bmat);
 	delete bmat;
-	test_faust();
-	test_faust2();
-	test_faust3();
+	if(argc > 1)
+	{
+		// mini-benchmark
+		test_faust();
+		test_faust2();
+		test_faust3();
+	}
 	return EXIT_SUCCESS;
 }