Fix #86: Make cmucl work with gcc 8.1.1 and later
In alloc(), save the fpu state on entry to the function and restore it just before returning. While we're at it, use the __attribute__ option to get a 16-byte aligned area where we can save the fpu state. And also set optimization to -O2 for linux.
issue-86-save-fpu-state-on-entry-to-alloc in 8 minutes and 43 seconds (queued for 2 seconds)2 jobs for