Add ROCPROFSYS_PATH variable to environment (#1103)

* Add ROCPROFSYS_ROOT to the env for sample

* Add env for causal

* Add env for instrument

* Check for null and address memory leak

Signed-off-by: David Galiffi <David.Galiffi@amd.com>

---------

Signed-off-by: David Galiffi <David.Galiffi@amd.com>

projects/rocprofiler-systems/source/bin/rocprof-sys-sample/rocprof-sys-sample.hpp

@@ -46,6 +46,9 @@ print_updated_environment(std::vector<char*> _env);
 std::vector<char*>
 get_initial_environment();
 
+std::string
+get_rocprofsys_root(void);
+
 std::string
 get_internal_libpath(const std::string& _lib);