Fix several typo/warning/unused-code issues (#2655)

- Fix typo in wamr-test-suites script
- Fix compilation warnings in libc-wasi posix.c
- Remove unused code fast-jit jit_frontend.c
- Remove duplicated exception print in `iwasm -f <function>`
- Fix return value in void function wasm_runtime_set_wasi_ctx

core/iwasm/common/wasm_application.c

@@ -312,7 +312,6 @@ execute_func(WASMModuleInstanceCommon *module_inst, const char *name,
 #endif
     int32 i, p, module_type;
     uint64 total_size;
-    const char *exception;
     char buf[128];
 
     bh_assert(argc >= 0);
@@ -632,9 +631,7 @@ fail:
     if (argv1)
         wasm_runtime_free(argv1);
 
-    exception = wasm_runtime_get_exception(module_inst);
-    bh_assert(exception);
-    os_printf("%s\n", exception);
+    bh_assert(wasm_runtime_get_exception(module_inst));
     return false;
 }
 

core/iwasm/common/wasm_native.c

@@ -542,8 +542,7 @@ void
 wasm_runtime_set_wasi_ctx(WASMModuleInstanceCommon *module_inst_comm,
                           WASIContext *wasi_ctx)
 {
-    return wasm_native_set_context(module_inst_comm, g_wasi_context_key,
-                                   wasi_ctx);
+    wasm_native_set_context(module_inst_comm, g_wasi_context_key, wasi_ctx);
 }
 
 static void