Fix SF bug #2938230: SIGILL on startup on Pentium II. Pentium II has fxsr (fxsave) but
no sse, and so ldmxcsr generates SIGILL.


git-svn-id: https://dosemu.svn.sourceforge.net/svnroot/dosemu/trunk@1999 7758b857-130e-0410-ab9c-d8735a528d18