[PATCH] Allow dllimport/dllexport on inline functions and get the linkage right

[Hans Wennborg]

I've gone ahead and committed this in r208925.

Richard didn't feel strongly about either direction for the linkage adjustment.

I'm happy to change this either way if Reid and David wants, and it's possible that new information comes to light as we go down this dll rabbit hole.

http://reviews.llvm.org/D3772