* config/float-i128.h: Make sure __STDC__VERSION__ is defined
	before using it.
	* config/float/i32.h: Likewise.
	* config/float-i386.h: Likewise.
	* config/float-i64.h: Likewise.
	* config/float-m68k.h: Likewise.
	* config/float-sh.h: Likewise.
	* config/float-sparc.h: Likewise.

From-SVN: r46187