Run libfuzzer build on travis.

Change-Id: I902762e27c157a173c2432643361555ef853a54e
diff --git a/test/end_to_end_shared_memory_fuzzer.cc b/test/end_to_end_shared_memory_fuzzer.cc
index f8267c4..0b039d8 100644
--- a/test/end_to_end_shared_memory_fuzzer.cc
+++ b/test/end_to_end_shared_memory_fuzzer.cc
@@ -138,7 +138,7 @@
 
   // Setup the TraceConfig for the consumer.
   TraceConfig trace_config;
-  trace_config.add_buffers()->set_size_kb(4);
+  trace_config.add_buffers()->set_size_kb(8);
   trace_config.set_duration_ms(10);
 
   // Create the buffer for ftrace.