compile_pkgs: fix invalid _report function call

This was renamed in HBL to report.

compile_pkgs

@@ -197,7 +197,7 @@ update_mirror() {
 	[ -d "$GIT_MIRROR" ] || return 0
 	[ -z "$mirror_updated" ] || return 0
 
-	_report "Updating local mirrors"
+	report "Updating local mirrors"
 	flock --exclusive "$GIT_MIRROR" "$SHELL" -s "$GIT_MIRROR" <<"EOF"
 		cd "$1"
 		for mirror in ./*; do