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/desktop-file-utils/desktop-file-utils_0.26.bb

@@ -19,7 +19,7 @@ EXTRA_OECONF += "ac_cv_prog_EMACS=no"
 
 BBCLASSEXTEND = "native nativesdk"
 
-do_install_append() {
+do_install:append() {
         rm -rf ${D}${datadir}/emacs
 }