[PATCH] powerpc64le build fails with GCC7

[Alexey Neyman]

Hi all,

With GCC7, the test for -mfloat128 fails with a message that this option 
requires -mfloat128-type to be supplied as well. Cannot supply both 
options unconditionally, though, as GCC6 would choke on unknown option.

Patch attached, please review. Build-tested only, with GCC 7.2.0 and 6.4.0.

Regards,
Alexey.

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