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-support/libcppkafka/libcppkafka_git.bb

@@ -17,6 +17,6 @@ inherit cmake
 
 S = "${WORKDIR}/git"
 
-do_install_append(){
+do_install:append(){
     chrpath -d ${D}${libdir}/libcppkafka.so.0.3.1
 }