Use new print() function and unicode literals everywhere

Author: frenzymadness

scripts/pethtool

@@ -12,6 +12,8 @@
 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 #   General Public License for more details.
 
+from __future__ import unicode_literals, print_function
+
 import getopt
 import ethtool
 import sys

scripts/pifconfig

@@ -14,6 +14,8 @@
 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 #   General Public License for more details.
 
+from __future__ import unicode_literals, print_function
+
 import ethtool
 import sys
 from optparse import OptionParser