Bug 6672 jar no longer exported after attach source
1206 1. Create a project test. 2. Add a jar (say resources.jar) to the classpath and export the entry 3. Attach source (say resourcessrc.zip) to the jar. Notice, the jar is no longer exported - this information is discarded during the attach source process.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/SourceAttachmentBlock.java
status.setError(NewWizardMessages.getString("SourceAttachmentBlock.prefix.error.deviceinpath")); 
					return status;
				}
			}				
		}
		return status;
	}
	
	private IStatus updateFileNameStatus() {
		StatusInfo status= new StatusInfo();
		fResolvedFile= null;
		fFileVariablePath= null;
		
		String fileName= fFileNameField.getText();
		if (fileName.length() == 0) {
			
			return status;
		} else {
			if (!Path.EMPTY.isValidPath(fileName)) {
				status.setError(NewWizardMessages.getString("SourceAttachmentBlock.filename.error.notvalid")); 
				return status;
			}
			IPath filePath= new Path(fileName);
			IPath resolvedPath;
			if (fIsVariableEntry) {
				if (filePath.getDevice() != null) {
					status.setError(NewWizardMessages.getString("SourceAttachmentBlock.filename.error.deviceinpath")); 
					return status;
				}
				String varName= filePath.segment(0);