Fix linting issue

Author: rhpvorderman

benchmark_scripts/gzipwrite128kblocks.py

@@ -1,5 +1,5 @@
-import sys
 import os
+import sys
 
 from isal import igzip
 

benchmark_scripts/gzipwritelines.py

@@ -1,5 +1,5 @@
-import sys
 import os
+import sys
 
 from isal import igzip