add initial support for the gcc "alignof(decl) is the alignment of the decl
not the type" semantics.  This can definitely be improved, but is better than
what we had.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@62939 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed