Add ia32 support and fix compiling issue for RT-Thread (#730)

product-mini/platforms/rt-thread/SConscript

@@ -6,13 +6,9 @@
 
 from building import *
 
-cwd     = GetCurrentDir()
-
-
+cwd = GetCurrentDir()
 src = Glob('*.c')
 
-CPPPATH = [cwd]
-
-group = DefineGroup('iwasm_entry', src, depend = ['PKG_USING_WAMR'], CPPPATH = CPPPATH)
+group = DefineGroup('iwasm', src, depend = ['PKG_USING_WAMR'])
 
 Return('group')

product-mini/platforms/rt-thread/iwasm.c

@@ -373,18 +373,17 @@ int iwasm(int argc, char **argv)
     /* destroy the module instance */
     wasm_runtime_deinstantiate(wasm_module_inst);
 
-    fail3:
+fail3:
     /* unload the module */
     wasm_runtime_unload(wasm_module);
 
-    fail2:
+fail2:
     /* free the file buffer */
     rt_free(wasm_file_buf);
 
-    fail1:
+fail1:
     /* destroy runtime environment */
     wasm_runtime_destroy();
     return 0;
 }
 MSH_CMD_EXPORT(iwasm, Embeded VM of WebAssembly);
-