Fix the following warning introduced by the recent change.
```
In file included from wamr/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/locking.h:17,
from wamr/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/posix.h:18,
from wamr/core/iwasm/aot/../common/wasm_runtime_common.h:18,
from wamr/core/iwasm/aot/aot_runtime.h:10,
from wamr/core/iwasm/aot/aot_loader.c:6:
wamr/core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/ssp_config.h:55: error: "CONFIG_HAS_ISATTY" redefined [-Werror]
#define CONFIG_HAS_ISATTY 1
In file included from wamr/core/shared/utils/../platform/include/platform_common.h:13,
from wamr/core/shared/utils/bh_platform.h:9,
from wamr/core/iwasm/aot/aot_runtime.h:9,
from wamr/core/iwasm/aot/aot_loader.c:6:
wamr/core/shared/platform/nuttx/platform_internal.h:75: note: this is the location of the previous definition
#define CONFIG_HAS_ISATTY 0
```
This directory consists of selected files copied from the [src/libemulator] directory in the cloudabi-utils repository, with minor modifications, along with the accompanying LICENSE file from that repository.
The modifications are marked with WASMTIME_* preprocessor macros.
The files were copied at git revision 223dadc53248552db43e012c67ed08cf416a2b12 which is dated Tue Jun 25 17:22:07 2019 -0700 .