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-support/libmicrohttpd/libmicrohttpd_0.9.73.bb

@@ -17,14 +17,14 @@ CFLAGS += "-pthread -D_REENTRANT"
 EXTRA_OECONF += "--disable-static --with-gnutls=${STAGING_LIBDIR}/../"
 
 PACKAGECONFIG ?= "curl https"
-PACKAGECONFIG_append_class-target = "\
+PACKAGECONFIG:append:class-target = "\
         ${@bb.utils.filter('DISTRO_FEATURES', 'largefile', d)} \
 "
 PACKAGECONFIG[largefile] = "--enable-largefile,--disable-largefile,,"
 PACKAGECONFIG[curl] = "--enable-curl,--disable-curl,curl,"
 PACKAGECONFIG[https] = "--enable-https,--disable-https,libgcrypt gnutls,"
 
-do_compile_append() {
+do_compile:append() {
     sed -i s:-L${STAGING_LIBDIR}::g libmicrohttpd.pc
 }