defmethod does not eval eql-specializer-forms

[Ian Horswill <IDH@AI.AI.MIT.EDU>]

I don't know what the right fix is for this.  I patched it by putting
a call to eval into parse-specializer in boot.lisp.  This is probably
wrong because it seems wrong for the "parser" to be eval'ing things
and is definitely wrong because it evaluates the form in a null
lexical environment whereas the spec says it should be evaled in the
environment ofr the defmethod.  It's sufficient for my purposes
however.

-ian