CMake: missing ws2_32 (and psapi ?) linking for mingw builds

[rouault]

configure.ac has the following logic

dnl ---------------------------------------------------------------------------
dnl Check if we need -lws2_32 (mingw)
dnl ---------------------------------------------------------------------------

echo "#include <winsock2.h>" > test_ws2_32.c
echo "#include <ws2tcpip.h>" >> test_ws2_32.c
echo "void foo() {}" >> test_ws2_32.c

if test -z "`${CC} -c test_ws2_32.c 2>&1`" ; then
  LIBS="$LIBS -lws2_32"
fi
rm -f test_ws2_32*

dnl ---------------------------------------------------------------------------
dnl Check if we need -lpsapi (mingw)
dnl ---------------------------------------------------------------------------

echo "#include <windows.h>" > test_psapi.c
echo "#include <psapi.h>" >> test_psapi.c
echo "void foo() {}" >> test_psapi.c

if test -z "`${CC} -c test_psapi.c 2>&1`" ; then
  LIBS="$LIBS -lpsapi"
fi
rm -f test_psapi*

This hasn't been ported yet to cmake builds.

[rouault]

From testing, this doesn't seem necessary. CMake automatically adds those libs!