forked from OERV-BSP/u-boot
Add the _EXTRA variants of U_BOOT_BUILD_DIR and U_BOOT_RESULT_DIR to the
list of environment variables set for hook scripts.
These were added in commit 8f2a9fa7d6 ("test: Support testing with two
board-builds") but were not documented.
Signed-off-by: David Lechner <dlechner@baylibre.com>