[PATCH][testsuite][ARM] Properly figure -mfloat-abi option for crypto tests

[Kyrill Tkachov]

Hi all,

When adding the testsuite options for the crypto tests we need to make sure that 
don't end up adding -mfloat-abi=softfp to a hard-float target like 
arm-none-linux-gnueabihf. This patch adds that code to figure out which 
-mfpu/-mfloat-abi combination to use in a similar approach to the NEON tests.

This patch addresses the same failures that Christophe mentioned in 
http://gcc.gnu.org/ml/gcc-patches/2014-01/msg00375.html
but with this patch we can get those tests to PASS on arm-none-linux-gnueabihf 
instead of being just UNSUPPORTED.

Tested arm-none-linux-gnueabihf and arm-none-eabi.

Ok for trunk?

Thanks,
Kyrill


2014-01-09  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

     * lib/target-supports.exp
     (check_effective_target_arm_crypto_ok_nocache): New.
     (check_effective_target_arm_crypto_ok): Use above procedure.
     (add_options_for_arm_crypto): Use et_arm_crypto_flags.
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