* sim/ucsim/cmd.src/cmdutil.cc: NUL device is detected as CG_FILE type

* sim/ucsim/cmd.src/cmdutil.cc: NUL device is detected as CG_FILE type
  on WIN32
* src/SDCCdwarf2.c, src/SDCCglobl.h, src/SDCCmain.c, src/SDCCutil.c,
  src/SDCCutil.h, src/avr/gen.c, src/ds390/gen.c, src/hc08/gen.c,
  src/mcs51/gen.c, src/pic/device.c, src/pic/gen.c, src/pic/pcode.c,
  src/pic/pcodepeep.c, src/pic/ralloc.c, src/pic16/device.h,
  src/pic16/gen.c, src/pic16/main.c, src/pic16/pcode.c,
  src/pic16/pcodepeep.c, src/pic16/ralloc.c, src/xa51/gen.c,
  src/z80/gen.c, support/Util/MySystem.c:
  accept slash and backslash as directory separator on WIN32 and
  Cygwin ports

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@4604 4a8a32a2-be11-0410-ad9d-d568d2c75423