Convert to new override syntax

This is the result of automated script conversion:

scripts/contrib/convert-overrides.py <oe-core directory>

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

(From OE-Core rev: 42344347be29f0997cc2f7636d9603b1fe1875ae)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/xmlto/xmlto_0.0.28.bb

@@ -18,14 +18,14 @@ CLEANBROKEN = "1"
 
 DEPENDS = "libxml2-native"
 
-RDEPENDS_${PN} = "docbook-xml-dtd4 \
+RDEPENDS:${PN} = "docbook-xml-dtd4 \
                   docbook-xsl-stylesheets \
                   util-linux \
                   libxml2 \
                   libxslt \
                   bash \
 "
-RDEPENDS_${PN}_append_class-target = " \
+RDEPENDS:${PN}:append:class-target = " \
                   libxml2-utils \
                   libxslt-bin \
                   coreutils \
@@ -34,9 +34,9 @@ CACHED_CONFIGUREVARS += "ac_cv_path_TAIL=tail ac_cv_path_GREP=grep"
 
 BBCLASSEXTEND = "native"
 
-EXTRA_OECONF_append = " BASH=/bin/bash GCP=/bin/cp XMLLINT=xmllint XSLTPROC=xsltproc"
+EXTRA_OECONF:append = " BASH=/bin/bash GCP=/bin/cp XMLLINT=xmllint XSLTPROC=xsltproc"
 
-do_install_append_class-native() {
+do_install:append:class-native() {
     create_wrapper ${D}${bindir}/xmlto XML_CATALOG_FILES=${sysconfdir}/xml/catalog
 }