DR14, DR101, and part of DR1: fix handling of extern "C" declarations in
namespaces, by treating them just like we treat extern "C" declarations in
function scope.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184223 91177308-0d34-0410-b5e6-96231b3b80d8
Fix C++ constructor/destructor tests when run on ARM


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184225 91177308-0d34-0410-b5e6-96231b3b80d8