PR ada/51483

	PR ada/51483
	* back_end.ads (Register_Type_Proc): Add 'precision' parameter.
	* cstand.adb (Register_Float_Type): Add 'precision' parameter and use
	it to set the RM size.  Use directly 'size' for the Esize.
	* gcc-interface/gigi.h (enumerate_modes): Add integer parameter.
	* gcc-interface/misc.c (enumerate_modes): Likewise.  Do not register
	types for vector modes, pass the size in addition to the precision.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_7-branch@208548 138bc75d-0d04-0410-961f-82ee72b054a4