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-python/recipes-devtools/python/python3-protobuf_3.17.3.bb

@@ -17,7 +17,7 @@ UPSTREAM_CHECK_REGEX = "protobuf/(?P<pver>\d+(\.\d+)+)/"
 
 DEPENDS += "protobuf"
 
-RDEPENDS_${PN} += " \
+RDEPENDS:${PN} += " \
     ${PYTHON_PN}-datetime \
     ${PYTHON_PN}-json \
     ${PYTHON_PN}-logging \
@@ -34,6 +34,6 @@ BBCLASSEXTEND = "native nativesdk"
 DISTUTILS_BUILD_ARGS += "--cpp_implementation"
 DISTUTILS_INSTALL_ARGS += "--cpp_implementation"
 
-do_compile_prepend_class-native () {
+do_compile:prepend:class-native () {
     export KOKORO_BUILD_NUMBER="1"
 }