Fix of memset usage

Build process failed following error (GCC 5.0):
btif_storage.c:1503:9: error: 'memset' used with constant zero length parameter; this could be due to transposed parameters [-Werror=memset-transposed-args]

Change-Id: I46e0d8bd6fcd9439b50b4f0aed5391c808b9eb73
Signed-off-by: Arseniy Antonov <arseniy.antonov@intel.com>