aomcx_set_ref -> aom_cx_set_ref

Change-Id: I60dd645451d6d65465f099a16ac855fb0b5a57a9
diff --git a/.gitignore b/.gitignore
index 7849829..8714d3f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -37,7 +37,7 @@
 /examples/simple_encoder
 /examples/twopass_encoder
 /examples/aom_multi_resolution_encoder
-/examples/aomcx_set_ref
+/examples/aom_cx_set_ref
 /examples/av1_spatial_scalable_encoder
 /examples/aom_temporal_scalable_patterns
 /examples/aom_temporal_svc_encoder