Fix potiential memory leak in wasi libc #9189

Job	Run time
build (-DWAMR_BUILD_AOT=1 -DWAMR_BUILD_INTERP=0)	1m 26s
build (-DWAMR_BUILD_AOT=0)	3m 1s
build (-DWAMR_BUILD_TAIL_CALL=1)	1m 57s
build (-DWAMR_BUILD_CUSTOM_NAME_SECTION=1)	1m 56s
build (-DWAMR_DISABLE_HW_BOUND_CHECK=1)	2m 18s
build (-DWAMR_BUILD_REF_TYPES=1)	2m 2s
build (-DWAMR_BUILD_SIMD=1)	1m 14s
build (-DWAMR_BUILD_DEBUG_INTERP=1)	2m 28s
build (-DWAMR_BUILD_LIB_PTHREAD=1)	1m 52s
build (-DWAMR_BUILD_LIB_WASI_THREADS=1)	2m 30s
build (-DWAMR_BUILD_LIBC_UVWASI=0 -DWAMR_BUILD_LIBC_WASI=1)	1m 38s
test (classic-interp, $DEFAULT_TEST_OPTIONS)	4m 35s
test (classic-interp, $MULTI_MODULES_TEST_OPTIONS)	4m 47s
test (classic-interp, $THREADS_TEST_OPTIONS)	3m 38s
test (classic-interp, $WASI_TEST_OPTIONS)	1m 41s
test (fast-interp, $DEFAULT_TEST_OPTIONS)	4m 28s
test (fast-interp, $MULTI_MODULES_TEST_OPTIONS)	4m 57s
test (fast-interp, $THREADS_TEST_OPTIONS)	3m 25s
test (fast-interp, $WASI_TEST_OPTIONS)	2m 7s
	52m 0s

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