tools/buildroot_config: Sync rootfs to devlib busybox & add '-o nice'…

… to ps

Set CONFIG_MODPROBE_SMALL=n and CONFIG_STATIC=y to allign the busybox
binary of the rootfs with that of devlib (refer to
$LISA/tools/recipes/busybox.recipe).

Set CONFIG_MODPROBE_SMALL=n to avoid an issue with insmod related to its
return value.

Moreover, set CONFIG_FEATURE_PS_ADDITIONAL_COLUMNS=y so that /bin/ps
supports the '-o nice' specifier. This is needed to evaluate issues
related to lisa-test during load related PELT Invariance tests on the
target they happen. Load depens on task priority, i.e. task nice value.

Signed-off-by: Dietmar Eggemann <[email protected]>

tools/buildroot_busybox_fragments

@@ -0,0 +1,3 @@
+CONFIG_MODPROBE_SMALL=n
+CONFIG_STATIC=y
+CONFIG_FEATURE_PS_ADDITIONAL_COLUMNS=y

tools/buildroot_config

@@ -23,3 +23,4 @@ BR2_PACKAGE_UTIL_LINUX=y
 BR2_PACKAGE_UTIL_LINUX_BINARIES=y
 BR2_PACKAGE_PYTHON3=y
 # BR2_TARGET_ROOTFS_TAR is not set
+BR2_PACKAGE_BUSYBOX_CONFIG_FRAGMENT_FILES="../../tools/buildroot_busybox_fragments"