Add reftest that checks the layout of repr(int) on non-c-like enums
Add reftest that checks the layout of repr(int) on non-c-like enums

This verifies the layout specified in rfc #2195

graydon/rust,graydon/rust,aidancully/rust,GBGamer/rust,graydon/rust,GBGamer/rust,aidancully/rust,aidancully/rust,graydon/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,aidancully/rust,graydon/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,graydon/rust,aidancully/rust