* win64 ignores -Cg

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27040 3ad0048d-3df7-0310-abae-a5850022a9f2
* make windres the default resource compiler on x86_64-win64

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27041 3ad0048d-3df7-0310-abae-a5850022a9f2
+ test for windows which tests if an .rc file can be really compiled into an .res file

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27042 3ad0048d-3df7-0310-abae-a5850022a9f2