Convert to new override syntax

This is the result of automated script (0.9.1) 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>

meta-oe/recipes-kernel/bpftool/bpftool.bb

@@ -25,7 +25,7 @@ SECURITY_CFLAGS = ""
 do_configure[depends] += "virtual/kernel:do_shared_workdir"
 
 COMPATIBLE_HOST = "(x86_64).*-linux"
-COMPATIBLE_HOST_libc-musl = 'null'
+COMPATIBLE_HOST:libc-musl = 'null'
 
 do_compile() {
     oe_runmake
@@ -37,7 +37,7 @@ do_install() {
 
 PACKAGE_ARCH = "${MACHINE_ARCH}"
 
-python do_package_prepend() {
+python do_package:prepend() {
     d.setVar('PKGV', d.getVar("KERNEL_VERSION").split("-")[0])
 }