linux-unwind.h (ppc_fallback_frame_state): Point saved CR2 offset to low 32 bits of regs->ccr rather than the whole 64-bit...

	* config/rs6000/linux-unwind.h (ppc_fallback_frame_state): Point
	saved CR2 offset to low 32 bits of regs->ccr rather than the whole
	64-bit register in 64-bit libgcc.

From-SVN: r129520