Resolve issues with using pre-installed onnxruntime (k2-fsa#1058)

There is an issue with the directory, ${location_onnxruntime_header_dir}
may be NOT-FOUND

Author: hantengc

cmake/onnxruntime.cmake

@@ -136,8 +136,8 @@ if(SHERPA_ONNX_USE_PRE_INSTALLED_ONNXRUNTIME_IF_AVAILABLE)
   else()
     find_path(location_onnxruntime_header_dir onnxruntime_cxx_api.h
       PATHS
-        /usr/include
-        /usr/local/include
+        /usr/include/onnxruntime
+        /usr/local/include/onnxruntime
     )
   endif()