Convert to new override syntax

This is the result of automated script conversion:

oe-core/scripts/contrib/convert-overrides.py .

converting the metadata to use ":" as the override character instead of "_".

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

dynamic-layers/networking-layer/recipes-support/drbd/drbd_%.bbappend

@@ -1,3 +1,3 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"
 
-COMPATIBLE_MACHINE_rpi = "(null)"
+COMPATIBLE_MACHINE:rpi = "(null)"