gitignore: add osmo-remsim-client-reader_conf

Change-Id: I1064aaf523ae368122a5fcc56ea1aa303ff0842e
diff --git a/.gitignore b/.gitignore
index a1cec37..1ceb8d7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -30,6 +30,7 @@
 m4
 gen_rspro.stamp
 
+src/client/osmo-remsim-client-reader_conf
 src/client/osmo-remsim-client-shell
 src/client/osmo-remsim-client-st2
 src/bankd/pcsc_test