[cmucl-imp] Cinco de Mayo snapshot

Just in time for Cinco de Mayo, the latest snapshot of cmucl is available and binaries will be uploaded shortly. As announced in the last snapshot, this snapshot and all future builds for x86 will require SSE2. As a side-effect the binaries are now half-sized because the x87 core is no longer included. The lisp core is still named lisp-sse2.core and not lisp.core as on other architectures. Ray