update .gitignore
diff --git a/.gitignore b/.gitignore
index b4d657f..d3315c9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,6 +36,7 @@
 tests/msgfile/msgfile_test
 tests/ussd/ussd_test
 tests/smscb/smscb_test
+tests/bits/bitrev_test
 
 utils/osmo-arfcn