Release proguard.bat in windows sdk

Also release proguard-android.txt

Change-Id: I7ca6aab59c8ac2f0313eca85dc3021015410dc96
diff --git a/build.gradle b/build.gradle
index fe2facd..733ba3c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -45,6 +45,10 @@
             into 'proguard'
             notice null
         }
+        item('files/proguard-android.txt') {
+            into 'proguard'
+            notice null
+        }
         item('files/proguard-android-optimize.txt') {
             into 'proguard'
             notice null
@@ -103,6 +107,13 @@
             notice null
         }
 
+        item("$rootProject.projectDir.parentFile/prebuilts/tools/common/proguard/proguard4.7/src/proguard/ant/task.properties") {
+            into 'proguard/ant'
+            notice null
+        }
+    }
+
+    common(mac, linux) {
         item("$rootProject.projectDir.parentFile/prebuilts/tools/common/proguard/proguard4.7/bin/proguard.sh") {
             into 'proguard/bin'
             notice null
@@ -117,23 +128,23 @@
             into 'proguard/bin'
             notice null
         }
+    }
 
-        item("$rootProject.projectDir.parentFile/prebuilts/tools/common/proguard/proguard4.7/src/proguard/ant/task.properties") {
-            into 'proguard/ant'
+    windows {
+        item("$rootProject.projectDir.parentFile/prebuilts/tools/common/proguard/proguard4.7/bin/proguard.bat") {
+            into 'proguard/bin'
+            notice null
+        }
+
+        item("$rootProject.projectDir.parentFile/prebuilts/tools/common/proguard/proguard4.7/bin/proguardgui.bat") {
+            into 'proguard/bin'
+            notice null
+        }
+
+        item("$rootProject.projectDir.parentFile/prebuilts/tools/common/proguard/proguard4.7/bin/retrace.bat") {
+            into 'proguard/bin'
             notice null
         }
     }
 
-    linux {
-
-    }
-
-    mac {
-
-    }
-
-    windows {
-
-    }
-
-}
\ No newline at end of file
+}