nuttx: Use text heap for executable memory (#1181)
nuttx: Use text heap for executable memory (#1181)

Based on nuttx patch "Add up_textheap_heapmember":
  https://github.com/apache/incubator-nuttx/pull/6306
bytecodealliance/wasm-micro-runtime,bytecodealliance/wasm-micro-runtime,bytecodealliance/wasm-micro-runtime,bytecodealliance/wasm-micro-runtime,bytecodealliance/wasm-micro-runtime,bytecodealliance/wasm-micro-runtime,bytecodealliance/wasm-micro-runtime,bytecodealliance/wasm-micro-runtime