pylintrc: enable more python3 checks

Missed a few in the source module.

Bug: 28298984
Test: running pylint on repohooks shows no new warnings
Change-Id: I0130b07a563448e069ced4702cd19caf65483519
diff --git a/tools/pylintrc b/tools/pylintrc
index cea7d1e..68c74ef 100644
--- a/tools/pylintrc
+++ b/tools/pylintrc
@@ -106,6 +106,7 @@
     intern-builtin,
     invalid-str-codec,
     long-builtin,
+    long-suffix,
     map-builtin-not-iterating,
     metaclass-assignment,
     next-method-called,
@@ -113,6 +114,8 @@
     nonzero-method,
     oct-method,
     old-division,
+    old-ne-operator,
+    old-octal-literal,
     old-raise-syntax,
     parameter-unpacking,
     print-statement,