[libFuzzer] change trace-pc to use 8-byte guards

llvm-svn: 281810
diff --git a/llvm/lib/Fuzzer/test/fuzzer.test b/llvm/lib/Fuzzer/test/fuzzer.test
index 0e7b26e..ce20785 100644
--- a/llvm/lib/Fuzzer/test/fuzzer.test
+++ b/llvm/lib/Fuzzer/test/fuzzer.test
@@ -49,3 +49,7 @@
 
 RUN: not LLVMFuzzer-InitializeTest 2>&1 | FileCheck %s
 
+RUN: not LLVMFuzzer-DSOTest 2>&1 | FileCheck %s --check-prefix=DSO
+DSO: INFO: Loaded 3 modules
+DSO: BINGO
+