Temporarily disable etc1 GM on Google3

Bug: skia:8684
Change-Id: I78aa90af2d643656532e082c4c12a60b08cf4d23
Reviewed-on: https://skia-review.googlesource.com/c/184194
Auto-Submit: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
diff --git a/gm/etc1.cpp b/gm/etc1.cpp
index 2a57c39..a384b12 100644
--- a/gm/etc1.cpp
+++ b/gm/etc1.cpp
@@ -9,7 +9,7 @@
 #include "sk_tool_utils.h"
 #include "SkRandom.h"
 
-#if SK_SUPPORT_GPU
+#if SK_SUPPORT_GPU && !defined(SK_BUILD_FOR_GOOGLE3)
 #include "etc1.h"
 
 #include "GrContext.h"