Restrict backslash replacement in build-impl.xml

Restricts the replacement of backslashes in build-impl.xml
to only on the Windows platform. Improves issue 4048.

Change-Id: I99f17c527333d136d9fd00fe8850b37d8f53f7d9
Reviewed-on: http://gerrit.dmdirc.com/1159
Reviewed-by: Chris Smith <chris@dmdirc.com>
Automatic-Compile: DMDirc Local Commits <dmdirc@googlemail.com>

nbproject/build-impl.xml

@@ -34,17 +34,22 @@ is divided into following sections:
         <!-- Empty placeholder for easier customization. -->
         <!-- You can override this target in the ../build.xml file. -->
     </target>
-    <target depends="-pre-init" name="-init-private">
-        <property file="nbproject/private/config.properties"/>
-        <property file="nbproject/private/configs/${config}.properties"/>
-        <property file="nbproject/private/private.properties"/>
+    <condition property="is.windows"><os family="windows"/></condition>
+    <target name="-init-dynamic-properties">
 	<mkdir dir="nbproject/private/" />
 	<delete file="nbproject/private/dynamic.properties" />
         <echo file="nbproject/private/dynamic.properties" append="true"># DO NOT EDIT THIS FILE, IT WILL BE OVERWRITTEN BY ANT
 </echo>
         <echo file="nbproject/private/dynamic.properties" append="true">private.classpath=${toString:plugins.libs}
 </echo>
+    </target>
+    <target depends="-init-dynamic-properties" name="-init-dynamic-properties-windows" if="is.windows">
         <replace file="nbproject/private/dynamic.properties" token="\" value="/"/> <!-- this replaces backslashes with slashes on Windows -->
+    </target>
+    <target depends="-pre-init,-init-dynamic-properties,-init-dynamic-properties-windows" name="-init-private">
+        <property file="nbproject/private/config.properties"/>
+        <property file="nbproject/private/configs/${config}.properties"/>
+        <property file="nbproject/private/private.properties"/>
         <property file="nbproject/private/dynamic.properties"/>
     </target>
     <target depends="-pre-init,-init-private" name="-init-user">