Revert "kill package_extract_dir"

This reverts commit 53c38b15381ace565227e49104a6fd64c4c28dcc.

Change-Id: Id998923948fb51ef5640c8be8884801c4f8d90e3
diff --git a/otautil/Android.bp b/otautil/Android.bp
index a2eaa04..0b23143 100644
--- a/otautil/Android.bp
+++ b/otautil/Android.bp
@@ -18,6 +18,7 @@
     srcs: [
         "SysUtil.cpp",
         "DirUtil.cpp",
+        "ZipUtil.cpp",
         "ThermalUtil.cpp",
     ],