Implement call Fast JIT function from LLVM JIT jitted code (#1714)

Basically implement the Multi-tier JIT engine.
And update document and wamr-test-suites script.

core/iwasm/fast-jit/jit_frontend.h

@@ -13,6 +13,10 @@
 #include "../aot/aot_runtime.h"
 #endif
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #if WASM_ENABLE_AOT == 0
 typedef enum IntCond {
     INT_EQZ = 0,
@@ -143,6 +147,9 @@ jit_frontend_translate_func(JitCompContext *cc);
 bool
 jit_frontend_lower(JitCompContext *cc);
 
+uint32
+jit_frontend_get_jitted_return_addr_offset();
+
 uint32
 jit_frontend_get_global_data_offset(const WASMModule *module,
                                     uint32 global_idx);
@@ -483,4 +490,8 @@ set_local_f64(JitFrame *frame, int n, JitReg val)
 #define PUSH_FUNCREF(v) PUSH(v, VALUE_TYPE_FUNCREF)
 #define PUSH_EXTERNREF(v) PUSH(v, VALUE_TYPE_EXTERNREF)
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif