XFAIL multibyte tests until they are fixed (bug 66582)
drop precision since trigonometric functions are non-portable

See: http://stackoverflow.com/questions/21212326/floating-point-arithmetic-and-reproducibility
Merge branch 'PHP-5.4' into PHP-5.5

* PHP-5.4:
  drop precision since trigonometric functions are non-portable
  XFAIL multibyte tests until they are fixed (bug 66582)