didn't see a script in repo to provide this capability and reporter didn't decide to share a solution here.
create a tmp file called /tmp/cr and insert the copyright text ;
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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after copying in the new tzdata files to jdk/make/sun/javazic/tzdata simply run this command :
for i in `ls`; do cat /tmp/cr | cat - $i > /tmp/myfile && mv /tmp/myfile $i; done