Removed AC_CHECK_FUNCS_ONCE, it does not work on automake 1.9.
Removed AC_CHECK_FUNCS_ONCE, it does not work on automake 1.9.

mckelvin/libmemcached,mckelvin/libmemcached,tony2001/libmemcached,tony2001/libmemcached,tony2001/libmemcached,mckelvin/libmemcached