[libFuzzer] add -timeout_exitcode option

llvm-svn: 259265
diff --git a/llvm/lib/Fuzzer/test/fuzzer-timeout.test b/llvm/lib/Fuzzer/test/fuzzer-timeout.test
index 8db5f89..2de460d 100644
--- a/llvm/lib/Fuzzer/test/fuzzer-timeout.test
+++ b/llvm/lib/Fuzzer/test/fuzzer-timeout.test
@@ -12,3 +12,4 @@
 SingleInputTimeoutTest-NOT: Test unit written to ./timeout-
 
 RUN: ASAN_OPTIONS=handle_abort=0 not --crash LLVMFuzzer-TimeoutTest -timeout=1 -abort_on_timeout=1
+RUN: LLVMFuzzer-TimeoutTest -timeout=1 -timeout_exitcode=0