Change lib path "/usr/lib" -> "/usr/lib64" at 64bit env

Change lib path "/usr/lib" -> "/usr/lib64" at 64bit env

python3 crashed at 64bit env
================================================================
Could not find platform independent libraries <prefix>
Could not find platform dependent libraries <exec_prefix>
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
Fatal Python error: initfsencoding: unable to load the file system codec
ModuleNotFoundError: No module named 'encodings'
================================================================

Change-Id: Id76694616dfc53cec7547619c6931cb7a47be0a8
Signed-off-by: DongHun Kwak <dh0128.kwak@samsung.com>