Fix Travis Coverage (#1409)

* Fix JOB_COUNT env var

That took way longer than it should have to figure out

* Fix incorrect comment

Whoops...

.travis.yml

@@ -14,7 +14,7 @@ stages:
 env:
   global:
     - CC_TEST_REPORTER_ID=db72f1ed59628c16eb0c00cbcd629c4c71f68aa1892ef42d18c7c2b8326f460a
-    - JOB_COUNT=2 # Two jobs generate test coverage
+    - JOB_COUNT=3 # Three jobs generate test coverage: ethereum, native, and other
     - PYTHONWARNINGS="default::ResourceWarning" # Enable ResourceWarnings
   matrix:
     - TEST_TYPE=examples