* decContext.c, decContext.h, decDPD.h, decimal128.c,

	* decContext.c, decContext.h, decDPD.h, decimal128.c,
	decimal128.h, decimal32.c, decimal32.h, decimal64.c, decimal64.h,
	decLibrary.c, decNumber.c, decNumber.h, decNumberLocal.h,
	decRound.c, decRound.h, decUtility.c, decUtility.h: Add
	libgcc-style license exception clause.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@122722 138bc75d-0d04-0410-961f-82ee72b054a4