misc cleanups

This change touches several subsystems, tools and experiments
(sal, util, cmake, import-trace, generic-tracing, nanojpeg), and
changes details not worth separate commits.

Change-Id: Icd1d664d1be5cfc2212dbf77801c271183214d08

tools/import-trace/RandomJumpImporter.hpp

@@ -16,6 +16,7 @@ class RandomJumpImporter : public Importer {
 	fail::MemoryMap *m_mm_from, *m_mm_to;
 	std::vector<fail::guest_address_t> m_jump_to_addresses;
 public:
+	RandomJumpImporter() : m_mm_from(0), m_mm_to(0) {}
 	/**
 	 * Callback function that can be used to add command line options
 	 * to the campaign