configs/beaglebone: don't use custom post-image script

Use support/scripts/genimage.sh, instead, which prevents duplicating
TARGET_DIR under ${BUILD_DIR}/genimage.tmp/root.

Use a post-build script to copy uEnv.txt to BINARIES_DIR, as made for
beagleboneai.

Keep the post-image script because it is still used by beaglebone_qt5.

Signed-off-by: Carlos Santos <unixmania@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

board/beaglebone/post-build.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+BOARD_DIR="$(dirname $0)"
+
+cp $BOARD_DIR/uEnv.txt $BINARIES_DIR/uEnv.txt

configs/beaglebone_defconfig

@@ -2,7 +2,9 @@ BR2_arm=y
 BR2_cortex_a8=y
 BR2_GLOBAL_PATCH_DIR="board/beaglebone/patches"
 BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_19=y
-BR2_ROOTFS_POST_IMAGE_SCRIPT="board/beaglebone/post-image.sh"
+BR2_ROOTFS_POST_BUILD_SCRIPT="board/beaglebone/post-build.sh"
+BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
+BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/beaglebone/genimage.cfg"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_GIT=y
 BR2_LINUX_KERNEL_CUSTOM_REPO_URL="git://git.ti.com/processor-sdk/processor-sdk-linux.git"