Add Vim modelines

Change-Id: I23f30cd9be56089498089f8b12abe3f3e186b525
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/sensorset.cpp b/sensorset.cpp
index 708e3a5..07c104f 100644
--- a/sensorset.cpp
+++ b/sensorset.cpp
@@ -42,3 +42,5 @@
         container[make_pair(match[1], match[2])].emplace(match[3]);
     }
 }
+
+// vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4