Add information about C++1y support to Clang 3.4 release notes.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_34@197115 91177308-0d34-0410-b5e6-96231b3b80d8
Fix RST syntax errors.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_34@197117 91177308-0d34-0410-b5e6-96231b3b80d8
Fix another formatting bug.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_34@197118 91177308-0d34-0410-b5e6-96231b3b80d8