Both CLISP and SBCL fail when making arrays of 64 bit integers,
despite cffi-features:no-long-long being absent for either.
Therefore, conditionalize away these types in *array-element-types* on
32 bit platforms in general, and conditionalize away all the 64 bit
tests as well. Separated out integer size check into types.lisp.
Restored tests vector-min and vector-max which fail in SBCL for
(signed-integer 8) and (signed-integer 16) for unknown reasons.
64 bit SBCL: TOTAL: 1223 assertions passed, 5 failed, 0 execution errors.
64 bit CCL: TOTAL: 1228 assertions passed, 0 failed, 0 execution errors.
32 bit SBCL: TOTAL: 1069 assertions passed, 31 failed, 0 execution errors.
32 bit CLISP: TOTAL: 1051 assertions passed, 27 failed, 5 execution errors.