Use our provided JNA library, versus one installed on the system

which might be older and not work.

bin/elasticsearch.in.bat

@@ -85,5 +85,8 @@ set JAVA_OPTS=%JAVA_OPTS% -XX:+DisableExplicitGC
 REM Ensure UTF-8 encoding by default (e.g. filenames)
 set JAVA_OPTS=%JAVA_OPTS% -Dfile.encoding=UTF-8
 
+REM Use our provided JNA always versus the system one
+set JAVA_OPTS=%JAVA_OPTS% -Djna.nosys=true
+
 set ES_CLASSPATH=%ES_CLASSPATH%;%ES_HOME%/lib/${project.build.finalName}.jar;%ES_HOME%/lib/*;%ES_HOME%/lib/sigar/*
 set ES_PARAMS=-Delasticsearch -Des-foreground=yes -Des.path.home="%ES_HOME%"

bin/elasticsearch.in.sh

@@ -68,3 +68,6 @@ JAVA_OPTS="$JAVA_OPTS -XX:+DisableExplicitGC"
 
 # Ensure UTF-8 encoding by default (e.g. filenames)
 JAVA_OPTS="$JAVA_OPTS -Dfile.encoding=UTF-8"
+
+# Use our provided JNA always versus the system one
+JAVA_OPTS="$JAVA_OPTS -Djna.nosys=true"

pom.xml

@@ -469,6 +469,7 @@
                 <argument>-XX:+HeapDumpOnOutOfMemoryError</argument>
                 <argument>-XX:+DisableExplicitGC</argument>
                 <argument>-Dfile.encoding=UTF-8</argument>
+                <argument>-Djna.nosys=true</argument>
                 <argument>-Delasticsearch</argument>
               </arguments>
             </configuration>