- Update to version 1.1.9
  * New feature:
    + the contrib SB-GMP links with libgmp at runtime to speed up
    arithmetic on bignums and ratios. (contributed by Stephan
    Frank)
  * Enhancement:
    + disassemble now annotates some previously
      missing static functions, like LENGTH.
    + SB-EXT:PRINT-SYMBOL-WITH-PREFIX can be used within ~// to
      print a symbol with a package prefix.
    + The debugger and backtracing are more robust against buggy
      PRINT-OBJECT methods.
  * Optimization:
    + calls to static functions on x86-64 use less instructions.
    + compute encode-universal-time at compile time when possible.
    + when referencing internal functions as #'x, don't go through
      an indirect fdefn structure.
    + SLEEP doesn't cons on non-immediate floats and on ratios.
    + (mod fixnum) type-checks are performed using one unsigned
      comparison, instead of two.
    + enable more modular arithmetic transforms in the presence of
     conditionals.
    + bitwise OR forms can now trigger modular arithmetic as well,
      when the result is known to be negative.
    + recognize more cases of useless LOGAND/LOGIOR with constants.
    + comparisons between rationals and constant floats or between
      integers and constant ratios are now converted to rationals/integers
      at compile time.
    + Smaller and faster DOUBLE-FLOAT-LOW-BITS on x86-64.
  * Bug Fix: (forwarded request 182209 from toganm)

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