last-access-test is wrongly conditionalized for LispWorks not on linux or darwin

[Yehouda]

history-tree/tests/tests.lisp

Line 359 in c1ae76f

;; According to the `local-time' manual subsecond precision is only

The time to sleep inside the test last-access-test is conditionalize for lispworks to be short, but the doc for local-time says:
"local-time currently supports sub-second precision clocks with ABCL,
Allegro, CMUCL, CCL, SBCL, and LispWorks for Linux or Darwin."
https://github.com/dlowe-net/local-time/blob/40169fe26d9639f3d9560ec0255789bf00b30036/doc/local-time.texinfo#LL125C1-L127C62
so for LispWorks on other platforms (not linux or darwin) the local-time:timestamp/= form fails most of the time.