Bug#766944: slime: Emacs"M-x slime"+sbcl fails with "Package SWANK-REPL does not exist." if cl-swank cache not deleted

[Milan Zamazal]

Thanks for help, I could reproduce the bug again and it fixes it.

Since this bug makes slime package unusable for some users, I'll raise
its priority and request to unblock it for testing.  Please test the new
version (2.10-3).