Bug 37197 Basepath for relative pathes in JAR-exporter
The basepath for the JAR-exporter is the eclipse-install-directory. I prefer it to be the root of the project (the description is saved in), so that relative pathes end inside the project. Now: <jardesc> <jar path="workspace/projectdir/jar.jar"/> Desired: <jardesc> <jar path="jar.jar"/> Reason: To make the jardesc-files portable for shared projects
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/jarpackager/JarPackageData.java
* @param state a boolean containing the new state
	 * @see #getDescriptionLocation()
	 * @see IJarDescriptionWriter
	 */
	public void setSaveDescription(boolean state) {
		fSaveDescription= state;
	}
	
	/**
	 * Returns the location of file containing the description of a JAR.
	 * This location is inside the workspace.
	 * 
	 * @return	the path of the description file location,
	 * 			or <code>null</code> if none is specified
	 */
	public IPath getDescriptionLocation() {
		return fDescriptionLocation;
	}
	/**
	 * Set the location of the JAR description file.
	 * 
	 * @param descriptionLocation the path of location
	 */
	public void setDescriptionLocation(IPath descriptionLocation) {
		fDescriptionLocation= descriptionLocation;
	}
	/**
	 * Gets the description file (as workspace resource).
	 * 
	 * @return a file which points to the description