GenericExperiment: limit output logger buffer

Limit the serial-output logger buffer to prevent overly large memory
consumption in case the target system ends up, e.g., in an endless loop.
The buffer is limited to (golden-run output size)+1 to be able to detect
the case when the target system makes a correct output but faultily adds
extra characters afterwards.

Change-Id: I50c082f8fb09a702d87ab83732ca3e3463c46597

src/experiments/generic-experiment/experiment.hpp

@@ -23,6 +23,7 @@ class GenericExperiment : public fail::DatabaseExperiment {
 	bool enabled_e9_sol;
 	std::string e9_file;
 	SerialOutputLogger e9_sol;
+	std::vector<char> e9_goldenrun;
 
 	bool enabled_mem_text;
 	fail::MemAccessListener l_mem_text;