Use Python 3.x compatible syntax constructs

Avoid print operator, deprected except and
other things covered by statical checks.

Change-Id: I89f9608b977b2d4567300ec82558284dac347c9a
diff --git a/tools/skip_tracker.py b/tools/skip_tracker.py
index c7b0033..1ed6961 100755
--- a/tools/skip_tracker.py
+++ b/tools/skip_tracker.py
@@ -118,8 +118,8 @@
 
     unskips = sorted(set(unskips))
     if unskips:
-        print "The following bugs have been fixed and the corresponding skips"
-        print "should be removed from the test cases:"
-        print
+        print("The following bugs have been fixed and the corresponding skips")
+        print("should be removed from the test cases:")
+        print()
         for bug in unskips:
-            print "  %7s" % bug
+            print("  %7s" % bug)