Issue 80383

<http://www.openoffice.org/issues/show_bug.cgi?id=80338#desc21> revealed the
following problem:

Assume jurt.jar (including com.sun.star.lib.util.NativeLibraryLoader) is loaded
by the application classloader (e.g., because jurt.jar is added the the JVM
classpath) and java_uno.jar (including com.sun.star.bridges.jni_uno.JNI_proxy)
is loaded by com.sun.star.lib.unoloader.UnoClassLoader (the normal situation;
within OOo UnoClassLoader has some URLClassLoader as parent which in turn has
the application class loader as parent). 
bridges/source/jni_uno/java/com/sun/star/bridges/jni_uno/JNI_proxy.java:1.8 l.
50 calls NativeLibraryLoader.loadLibrary to load the java_uno dynamic library
needed by the dispatch_call native method.  NativeLibraryLoader.loadLibrary uses
System.load or System.loadLibrary to load the library.  Later, calling
JNI_proxy.dispatch_call leads to an UnsatisfiedLinkError.  Obviously, the JVM
does not allow code loaded with the UnoClassLoader to resolve native methods
against libraries loaded through code loaded with the application classloader.