Merging r197572:

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r197572 | rafael.espindola | 2013-12-18 09:35:37 -0500 (Wed, 18 Dec 2013) | 6 lines

One ppc32-darwin, a i64 inside a structure can have 32 bit alignment.

Thanks for Iain Sandoe for testing this with the original gcc.

Clang was already getting this right.

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llvm-svn: 205766