Patch to force SuitableAlign's alignment when loading on object with larger alignment

[jahanian]

On Aug 1, 2014, at 11:44 AM, Reid Kleckner <rnk at google.com> wrote:

> What is HasAlignAttribute, and how is it different from AlignmentIsRequired? I have a feeling that they are different names for the same thing. If you want to rename it, that's fine with me.
> 

I first thought I could use AlignmentIsRequired. But then I noticed that AlignmentIsRequired  is set only if current typedef has explicit
alignment. (see Decl::getMaxAlignment). We want to make sure that a typedef of an aligned typedef is 
still considered explicitly aligned (and not to modify its alignment). My patch has a test for this case.
- Fariborz

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