Use fxsave/fxrstor when available on i386 to deal with SSE fp.
Make sure the fxsave buffer is paragraph aligned (fixes a bug with DJGPP gcc
on x86_64).


git-svn-id: https://dosemu.svn.sourceforge.net/svnroot/dosemu/trunk@1741 7758b857-130e-0410-ab9c-d8735a528d18