Fix an issue with the setupDevWorkspace target on windows.

editor/tools/features/com.google.dart.tools.deploy.feature_releng/build-common.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <!-- ====================================================================== 
      Sep 6, 2011 4:17:37 PM                                                        
 
      Dart Tools build common Ant Script    
      Common targets and macros for the build of Dart Tools
                    
      mrrussell                                                                
      ====================================================================== -->
 <project name="Dart Tools build common Ant Script" default="notStandalone">
@@ skipping 60 matching lines @@
         <property name="build.osgi.os" value="win32" />
         <property name="build.osgi.ws" value="win32" />
         <condition property="installSdkWindows">
             <istrue value="${build.local.build}" />
         </condition>
         <condition property="isWindows">
             <!-- TODO (mrrusell) this can be turned into a property  once the
                   build is only running on OS specific builds -->
             <isset property="build.os" />
         </condition>
+        <property name="unzip.tool" value="third_party/7zip/7za.exe"/>
+        <property name="unzip.arg" value="x"/>
     </target>
     <target name="setOSMac" if="build.os.mac">
         <echo message="setup mac" />
         <property name="build.eclipse.os.ws" value="macosx.cocoa" />
         <property name="osfamily" value="macos" />
         <property name="build.osgi.os" value="macos" />
         <property name="build.osgi.ws" value="cocoa" />
         <condition property="installSdkNotWindows">
             <istrue value="${build.local.build}" />
         </condition>
         <condition property="isNotWindows">
             <!-- TODO (mrrusell) this can be turned into a property  once the
                   build is only running on OS specific builds -->
             <isset property="build.os" />
         </condition>
+        <property name="unzip.tool" value="unzip"/>
+        <property name="unzip.arg" value="-q"/>
     </target>
     <target name="setOSLinux" if="build.os.linux">
         <echo message="setup linux" />
         <property name="build.eclipse.os.ws" value="linux.gtk" />
         <property name="osfamily" value="linux" />
         <property name="build.osgi.os" value="linux" />
         <property name="build.osgi.ws" value="gtk" />
         <condition property="installSdkNotWindows">
             <istrue value="${build.local.build}" />
         </condition>
         <condition property="isNotWindows">
             <!-- TODO (mrrusell) this can be turned into a property  once the
                   build is only running on OS specific builds -->
             <isset property="build.os" />
         </condition>
+        <property name="unzip.tool" value="unzip"/>
+        <property name="unzip.arg" value="-q"/>
     </target>
     
     <!-- configure and validate the data location -->
     <target name="configDataLocation">
         <property name="data.location"
                   location="../com.google.dart.tools.deploy.feature_releng/build-settings" />
         <echoProperty propertyName="data.location" />
         <!--
           validate that the data location is a directory
         -->
@@ skipping 541 matching lines @@
 
     <target name="-unzipFile" if="do.unzip">
         <unzip src="${archive.name}" dest="${output.dir}" />
     </target>
     
     <target name="-untarFile" unless="do.unzip">
         <untar src="${archive.name}" dest="${output.dir}" compression="gzip" />
     </target>
 
 </project>