Android build script allow skip LLM

Differential Revision: D71236623

Pull Request resolved: pytorch#9304

Author: kirklandsign

build/build_android_library.sh

@@ -57,7 +57,7 @@ build_android_native_library() {
     -DEXECUTORCH_BUILD_EXTENSION_TENSOR=ON \
     -DEXECUTORCH_BUILD_KERNELS_OPTIMIZED=ON \
     -DEXECUTORCH_BUILD_KERNELS_QUANTIZED=ON \
-    -DEXECUTORCH_BUILD_KERNELS_CUSTOM=ON \
+    -DEXECUTORCH_BUILD_KERNELS_CUSTOM="${EXECUTORCH_BUILD_EXTENSION_LLM:-ON}" \
     -DEXECUTORCH_BUILD_NEURON="${EXECUTORCH_BUILD_NEURON}" \
     -DNEURON_BUFFER_ALLOCATOR_LIB="${NEURON_BUFFER_ALLOCATOR_LIB}" \
     -DEXECUTORCH_BUILD_QNN="${EXECUTORCH_BUILD_QNN}" \
@@ -88,8 +88,8 @@ build_android_native_library() {
     -DEXECUTORCH_LOG_LEVEL=Info \
     -DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=BOTH \
     -DNEURON_BUFFER_ALLOCATOR_LIB="$NEURON_BUFFER_ALLOCATOR_LIB" \
-    -DEXECUTORCH_BUILD_KERNELS_CUSTOM=ON \
-    -DEXECUTORCH_BUILD_LLAMA_JNI=ON \
+    -DEXECUTORCH_BUILD_KERNELS_CUSTOM="${EXECUTORCH_BUILD_EXTENSION_LLM:-ON}" \
+    -DEXECUTORCH_BUILD_LLAMA_JNI="${EXECUTORCH_BUILD_EXTENSION_LLM:-ON}" \
     -DCMAKE_BUILD_TYPE="${EXECUTORCH_CMAKE_BUILD_TYPE}" \
     -B"${CMAKE_OUT}"/extension/android