Objective-C [qoi] more gracefull recovery when 
'}' is missing for the ivar declarations.
// rdar://6854840


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177549 91177308-0d34-0410-b5e6-96231b3b80d8
[docs] Prominently note that modules are expemental.

And ask for people to try it out and send us bug reports!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177551 91177308-0d34-0410-b5e6-96231b3b80d8
[docs] Point inquisitive users to existing module.map files.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177552 91177308-0d34-0410-b5e6-96231b3b80d8
Do the error recovery for @end only.
I am not sure how much we can improve for
when a randon ObjC keyword is thrown into the
ivar decl. block. // rdar://6854840


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177553 91177308-0d34-0410-b5e6-96231b3b80d8