Avoid plain "aligned" attributes in installed headers

[Andreas Krebbel]

On 05/14/2012 09:57 PM, Joseph S. Myers wrote:
> Installed headers should always use the forms of attributes with __
> prefixes and suffixes, so __attribute__ ((__aligned__ (8))) instead of
> the plain "aligned" form, to avoid taking identifiers from the user's
> namespace.  (This isn't needed if the attribute is already a keyword
> such as "const".)
> 
> I propose this patch to fix the instances I found - could the powerpc
> and s390 maintainers review it? 

s390 part is ok. Thanks!

-Andreas-