Pattern synonyms for 7.8?

[Dr. ERDI Gergo]

Hi,

When I started working on pattern synonyms (#5144) back in August, it 
seemed the GHC 7.8 freeze was imminent, so I was planning for a 
first version in 7.10/8.0 (whatever it will be called). However, since not 
much has happened re: 7.8 since then (at least not much publicly visible), 
and on the other hand, my implementation of pattern synonyms is ready, I 
am now starting to wonder if it could be squeezed into 7.8. What are your 
thoughts on this?

Thanks,
 	Gergo