lintian rule : executable-not-elf-or-script in /usr/share/elasticsearch/bin/elasticsearch.in.sh

	* added a proper shell on top on the script

bin/elasticsearch.in.sh

@@ -1,3 +1,5 @@
+#!/bin/sh
+
 ES_CLASSPATH=$ES_CLASSPATH:$ES_HOME/lib/*:$ES_HOME/lib/sigar/*
 
 if [ "x$ES_MIN_MEM" = "x" ]; then