binutils: Fix override syntax

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

meta-oniro-core/recipes-devtools/binutils/binutils_2.37.bbappend

@@ -2,6 +2,6 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-do_install_append_class-target () {
+do_install:append:class-target () {
     chmod o-rx ${D}${prefix}/${TARGET_SYS}/bin/*
 }