Import WAMR Fast JIT (#1343)

Import WAMR Fast JIT which is a lightweight JIT with quick startup, small footprint,
relatively good performance (~40% to ~50% of LLVM JIT) and good portability.

Platforms supported: Linux, MacOS and Linux SGX.
Arch supported: x86-64.

core/iwasm/include/wasm_export.h

@@ -139,6 +139,9 @@ typedef struct RuntimeInitArgs {
     char ip_addr[128];
     int platform_port;
     int instance_port;
+
+    /* Fast JIT code cache size */
+    uint32_t fast_jit_code_cache_size;
 } RuntimeInitArgs;
 
 #ifndef WASM_VALKIND_T_DEFINED