hash cfg
hash cfg

Summary: Ever since we allowed `is_editable_cfg_friendly`, hashing of method bodies stopped fully working, as the existing hasher code only looked at IRCode, but not cfgs. This is getting fixed here.

Reviewed By: thezhangwei

Differential Revision: D41295520

fbshipit-source-id: 50d15d8f0a69b112776386758c6a40f3b51e9718

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