Windows build improvements:

  Added /Zo flag for VS2013 builds to add more debugging info
  Removed obsolete comment on unused /GS flag and obsolete
   /FR flag.
  Removed '#ifdef WIRESHARK_GENERATE_BSC_FILE' and related
   (which specified the obsolete /FR flag).
  Added /RELEASE flag to linker to set checksum in PE header
  Fixed an old typo.
  CMake added /INCREMENTAL:NO flag to linker to overide default
  and prevent warning messages.

Change-Id: I039b884657d2886acc273dc6dd099d07a7b8ec7d
Reviewed-on: https://code.wireshark.org/review/6110
Reviewed-by: Bill Meier <wmeier@newsguy.com>
Reviewed-by: Graham Bloice <graham.bloice@trihedral.com>
Petri-Dish: Graham Bloice <graham.bloice@trihedral.com>
Reviewed-by: Michael Mann <mmann78@netscape.net>