This allows a CMake toolchain (or other caller) to treat winegcc like MinGW,
specifying that it produce a separate file for imports, e.g.

set(CMAKE_IMPORT_LIBRARY_PREFIX lib)
set(CMAKE_IMPORT_LIBRARY_SUFFIX .a)
string(APPEND CMAKE_C_CREATE_SHARED_LIBRARY " -Wl,--out-implib,<TARGET_IMPLIB>")
Signed-off-by: Kevin Puetz <PuetzKevinA@JohnDeere.com>
Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>