gcc: enable big-endian toolchain for armv7-R#765

stephanosio merged 1 commit intozephyrproject-rtos:mainzephyrproject-rtos/sdk-ng:mainfrom

ntavish:fix/enable-armv7-r-big-endian-multilibntavish/sdk-ng:fix/enable-armv7-r-big-endian-multilibCopy head branch name to clipboard