[COMMITTED] Use C99 math macros

[Wilco Dijkstra]

This patch renames all uses of __isinf*, __isnan*, __finite* and __signbit* to the standard C99
macros. This has no effect on generated code (checked on AArch64).

Commited as trivial patch (d81f....0690).

-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: math_macros.txt
URL: <http://sourceware.org/pipermail/libc-alpha/attachments/20150603/e17bdf40/attachment.txt>