Remove changing uids/timestamps from zip/jar files

Pass -X to zip so that Unix UID/GID and extra timestamps aren't
saved into the zip files.

Add a new tool, ziptime, that uses a very stripped down copy of
zipalign. It no longer depends on libandroidfw, and now rewrites the
timestamps in place instead of making a copy of the zipfile. This should
improve speed and reduce disk requirements, especially with the large
packaging zip files.

Bug: 24201956
Change-Id: I50f68669f659da1b4393e964ad40b6aafb00c1e7
diff --git a/tools/ziptime/README.txt b/tools/ziptime/README.txt
new file mode 100644
index 0000000..8a101e9
--- /dev/null
+++ b/tools/ziptime/README.txt
@@ -0,0 +1,10 @@
+ziptime -- zip timestamp tool
+
+usage: ziptime file.zip
+
+  file.zip is an existing Zip archive to rewrite
+
+
+This tools replaces the timestamps in the zip headers with a static time
+(Jan 1 2008). The extra fields are not changed, so you'll need to use the
+-X option to zip so that it doesn't create the 'universal time' extra.