Make directories up to private.properties

Change-Id: I32b102f8e7f7929192c2dac17736cb23f08b697f
Reviewed-on: http://gerrit.dmdirc.com/2502
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>

build-ivy.xml

@@ -34,7 +34,7 @@
             </path>
             <map from="${basedir}${file.separator}" to=""/>
         </pathconvert>
-        <touch file="nbproject/private/private.properties"/>
+        <touch mkdirs="true" file="nbproject/private/private.properties"/>
         <propertyfile file="nbproject/private/private.properties">
             <entry operation="=" key="lib.classpath" value="${lib.classpath.computed}"/>
         </propertyfile>