Fix arm-eabi attributes

[Nathan Sidwell]

This patch fixes a latent problem with arm eabi attributes.  We triggered off 
TE_LINUX when defaulting the FPU, thus leading to a lack of default for plain 
arm-eabi, leading to incorrect object files.

this patch changes the assembler to
*) default to plain VFP for eabi configs.  There's no requirement for it to be V2.

*) Check EABI_DEFAULT's existance when defaulting the fpu.

the testsuite tweaks are

*) force neon where we need it

*) correct a previously incorrect .double encoding, which was an outcome of 
incorrectly tagged object.

tested on arm-eabi and arm-linux-gnueabi.  ok?

nathan

-- 
Nathan Sidwell    ::   http://www.codesourcery.com   ::         CodeSourcery

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