runtime_lib.cmake: enable WAMR_BUILD_MODULE_INST_CONTEXT for wasi-nn

as we do for wasi (WAMR_BUILD_LIBC_WASI)

Author: yamt

build-scripts/runtime_lib.cmake

@@ -106,6 +106,7 @@ endif ()
 
 if (WAMR_BUILD_WASI_NN EQUAL 1)
     include (${IWASM_DIR}/libraries/wasi-nn/cmake/wasi_nn.cmake)
+    set (WAMR_BUILD_MODULE_INST_CONTEXT 1)
 endif ()
 
 if (WAMR_BUILD_LIB_PTHREAD EQUAL 1)