time: add haiku

core/time/time_other.odin

@@ -9,6 +9,7 @@
 #+build !wasi
 #+build !windows
 #+build !orca
+#+build !haiku
 package time
 
 _IS_SUPPORTED :: false

core/time/time_unix.odin

@@ -1,5 +1,5 @@
 #+private
-#+build darwin, freebsd, openbsd, netbsd
+#+build darwin, freebsd, openbsd, netbsd, haiku
 package time
 
 import "core:sys/posix"