cpumf/lshwc: Free buffer allocated with malloc

Free all buffers allocated with malloc before program exit.
Handle memory leak in libcpumf_cpuset().

Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

cpumf/lshwc.c

@@ -767,5 +767,6 @@ int main(int argc, char **argv)
 	}
 	free_counternames();
 	free(check);
+	free(ioctlbuffer);
 	return ch;
 }