Build frameworks with EXECUTORCH_XNNPACK_SHARED_WORKSPACE flag.

Differential Revision: D62308655

Pull Request resolved: #5135

Author: shoumikhin

build/build_apple_frameworks.sh

@@ -163,6 +163,7 @@ cmake_build() {
         -DEXECUTORCH_BUILD_COREML=$COREML \
         -DEXECUTORCH_BUILD_MPS=$MPS \
         -DEXECUTORCH_BUILD_XNNPACK=$XNNPACK \
+        -DEXECUTORCH_XNNPACK_SHARED_WORKSPACE=ON \
         -DEXECUTORCH_BUILD_EXTENSION_APPLE=ON \
         -DEXECUTORCH_BUILD_EXTENSION_DATA_LOADER=ON \
         -DEXECUTORCH_BUILD_EXTENSION_MODULE=ON \