Standardize unsigned ints:
uint8_t -> u_int8_t
uint32_t -> u_int32_t
uint64_t ->u_int64_t
Windows seems to differentiate between the two, linux does not.

git-svn-id: file:///svn/tokudb@5239 c7de825b-a66e-492c-adef-691d508d4ae1