[Gm2] fixes to SHIFT

[Gaius Mulley]

Hi,

finally fixed some bugs in SHIFT, here are the changes:

    * GNU Modula-2 passes all tests on LP64 debian stable.
    * gm2/iso/run/pass/shift[45].mod:  (New files).
    * gm2/Make-lang.in:  makeSystem now uses the last argument
      for the destination filename.
    * gm2/gccgm2.c:  removed tabs.
    * gm2/gm2-libs/SYSTEM.mod:  use memcpy, memset if shifting
      a whole number of words.  Also fixed bugs in ShiftLeft and
      ShiftRight.
    * gm2/gm2-libs-iso/SYSTEM.mod:  use memcpy, memset if shifting
      a whole number of words.  Also fixed bugs in ShiftLeft and
      ShiftRight.
    * gm2/gm2-libs-min/SYSTEM.mod:  fixed dates.
    * gm2/tools-src/makeSystem:  modified so that the last
    * argument now contains the destination filename.  Thus allowing
      compile errors to be emitted sensibly.

the tests:

   gm2/iso/run/pass/shift[345].mod

may be affected

regards,
Gaius