support 5.5 series

(cherry picked from commit 6da57ce7b95235a1a6b6588fcf6a84af125b3ef2)

Makefile

@@ -1,6 +1,6 @@
 DISTS ?= buster jessie stretch wheezy focal bionic trusty xenial
 
-VERSION ?= 5.4.0
+VERSION ?= 5.5.0
 
 all: clean
 	for i in $(DISTS) ; do \

create_dockerfile.sh

@@ -75,6 +75,10 @@ case ${dist} in
 esac
 
 case ${version} in
+  5\.5*)
+    echo "5.5 series"
+    kam_version="55"
+    ;;
   5\.4*)
     echo "5.4 series"
     kam_version="54"