threads is broken on ia64 (marcel is investigating) and seems useless
elsewhere.
Filter `-funroll-loops' out of CFLAGS for now -- it seems to cause
miscompilation occasionally.
Correct the dependencies to stop requiring a particular version number
of the ICU's libraries to ease future upgrades.
Add Ukrainian KOI8-U encoding and fix Ukrainian spell-out rules.
Build the vendor's tests and run them automatically after build.
Once the wrinkles (if any) are ironed out, the current users of
icu2 should switch to icu and icu2 deleted.
PR: ports/71790
Submitted by: Andriy Gapon
