[collectd] Workaround for crosscompiling java plugin..

[Daniel Hilst Selli]

Hi, I came across a problem while crosscompiling java plugin, I'm using 
arm architeture..

Here is the thing, since I'm targeting an arm, I need an arm libjvm.so, 
found on EJRE, to compile java.so plugin. OK, no problem so far..

The problem comes here, since Java plugins like GenericJMX has to be 
compiled too I need a JDK.. There is no JDK for embedded, not one that I 
know, so I need an target JRE (libjvm.so) and a host JDK (jar, javac, ...)

AFAIK current building process has no way to setup target JRE and host 
JDK, so what I did -- is ugly -- I replace x86 libjvm.so on 
JDK_HOME/jre/lib/amd64/server/ for the one that comes on EJRE.

Is an error prone procedure and is ugly, I'm not really an autotools 
hacker, but it should detect cross compiling, can we take advantage of 
this to setup target JRE?

Cheers