Support static linking onnxruntime lib for 32-bit arm (#401)

build-arm-linux-gnueabihf.sh

@@ -34,10 +34,15 @@ fi
 export CPLUS_INCLUDE_PATH=$PWD/alsa-lib/include:$CPLUS_INCLUDE_PATH
 export SHERPA_ONNX_ALSA_LIB_DIR=$PWD/alsa-lib/src/.libs
 
+if [[ x"$BUILD_SHARED_LIBS" == x"" ]]; then
+  # By default, use static link
+  BUILD_SHARED_LIBS=OFF
+fi
+
 cmake \
   -DCMAKE_INSTALL_PREFIX=./install \
   -DCMAKE_BUILD_TYPE=Release \
-  -DBUILD_SHARED_LIBS=OFF \
+  -DBUILD_SHARED_LIBS=$BUILD_SHARED_LIBS \
   -DSHERPA_ONNX_ENABLE_TESTS=OFF \
   -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
   -DSHERPA_ONNX_ENABLE_CHECK=OFF \