use enum name as constant prefix

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[Slids]

I like the idea, but you a) Need to sign the cla b) fix the tests (sadly not the ABCL test, there's something going on I haven't figured out) c) We need to make an anouncement as this is a breaking change.

[jidibinlin]

I will find a time to solve this issue

[jidibinlin]

I have fixed the enum-mapping-test.lisp file。 But still can`t pass all the test。