[patch, arm] Backport PR45094 fix to 4.5

[Yao Qi]

PR 45094 was fixed by this patch on mainline
http://gcc.gnu.org/ml/gcc-patches/2010-08/msg00249.html.  This patch is
to backport this fix to 4.5 branch.
Note that since 'dg-add-options arm_neon' doesn't work on 4.5 branch, it
is replaced by '-mfpu=neon -mfloat-abi=softfp' in dg-options.

OK for 4.5?

-- 
Yao (齐尧)
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