C Compiler (cl.exe, gcc-wrapper.exe) for firebird generates 32bit
object file but windres on cygwin-64 generates 64bit one. It causes
link error. This patch unifies these objects in 32bit.

Change-Id: Ie631bdcc22eedd694c880f55101db77b9ac5f669
Reviewed-on: https://gerrit.libreoffice.org/5273Reviewed-by: Tor Lillqvist <tml@iki.fi>
Tested-by: Tor Lillqvist <tml@iki.fi>