package/gcc: Backport code generation fix for ARC700

package/gcc: Backport code generation fix for ARC700

Fixes assembler failure when compiling for ARC700 only:
------------------------>8---------------------
{standard input}: Assembler messages:
{standard input}:213: Error: operand out of range (128 is not between -128 and 127)
make[2]: *** [scripts/Makefile.build:317: net/ipv4/xfrm4_mode_tunnel.o] Error 1
------------------------>8---------------------

This is an upstream fix scheduled for the next release, see
https://github.com/gcc-mirror/gcc/commit/5afc07eeb18fb7dd351ac981367bce721ca22af3

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>