Build system (libdw), correlation ID, and shebang fixes (#354)

* Fix compilation for output library

- link to targets for ATT (amd-comgr, dw, elf)

* Relax correlation ID retirement log failures

- only fail for correlation ID retirement underflow when building in CI mode

* Fix shebang for several files

- license was inserted before shebang in several places

* Update code coverage exclude folders for samples

* Tweak to agent tests

- test to make sure hsa agent is not the old value instead of testing that it is the new value

* Fix libdw include/link

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Co-authored-by: Jonathan R. Madsen <jonathanrmadsen@gmail.com>

tests/thread-trace/main.cpp

@@ -63,7 +63,7 @@ public:
 };
 
 int
-main(int argc, char** argv)
+main(int /*argc*/, char** /*argv*/)
 {
     hipMemory src1(DATA_SIZE);
     hipMemory src2(DATA_SIZE);