Use more inclusive terms.

Bug: b/162288333
Test: N/A
Change-Id: I0b7df559b0aa5e7b30908f634cab7190a9fb4def
diff --git a/services/surfaceflinger/tests/BufferGenerator.cpp b/services/surfaceflinger/tests/BufferGenerator.cpp
index 293738c..4868c12 100644
--- a/services/surfaceflinger/tests/BufferGenerator.cpp
+++ b/services/surfaceflinger/tests/BufferGenerator.cpp
@@ -88,7 +88,7 @@
     sp<Surface> mSurface;
 };
 
-/* Used to generate valid fences. It is not possible to create a dummy sync
+/* Used to generate valid fences. It is not possible to create a placeholder sync
  * fence for testing. Egl can generate buffers along with a valid fence.
  * The buffer cannot be guaranteed to be the same format across all devices so
  * a CPU filled buffer is used instead. The Egl fence is used along with the