HIP program state re-initialization logic

This commit is to support kernels dynamically loaded thru means such as
dlopen() after HIP runtime initializes.

include/hip/hcc_detail/program_state.hpp

@@ -93,11 +93,12 @@ public:
     }
 };
 
-const std::unordered_map<hsa_agent_t, std::vector<hsa_executable_t>>& executables();
+const std::unordered_map<hsa_agent_t, std::vector<hsa_executable_t>>& executables(
+    bool rebuild = false);
 const std::unordered_map<std::uintptr_t, std::vector<std::pair<hsa_agent_t, Kernel_descriptor>>>&
-functions();
-const std::unordered_map<std::uintptr_t, std::string>& function_names();
-std::unordered_map<std::string, void*>& globals();
+functions(bool rebuild = false);
+const std::unordered_map<std::uintptr_t, std::string>& function_names(bool rebuild = false);
+std::unordered_map<std::string, void*>& globals(bool rebuild = false);
 
 hsa_executable_t load_executable(const std::string& file, hsa_executable_t executable,
                                  hsa_agent_t agent);