[PATCH]Make pack-test-1 more flexible

[Nathan Sidwell]

gcc.dg/pack-test-1 presumes the natural alignment of the scalar types is the 
same as sizeof.  This is not true on m68k, where ints are 4 bytes but 2-byte 
aligned.  Thus 4-byte packing won't change the alignment of int fields.

This patch rearranges pack-test-1 to use alignof to determine natural alignments 
and cope with targets like m68k.

tested on m68k-linux-gnu and i686-linux-gnu, ok?

nathan
-- 
Nathan Sidwell    ::   http://www.codesourcery.com   ::         CodeSourcery
nathan@codesourcery.com    ::     http://www.planetfall.pwp.blueyonder.co.uk

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