android-tools: Add zlib, openssl dependency

* without zlib it fails to build
  http://logs.nslu2-linux.org/buildlogs/oe/oe-shr-core-branches/log.world.20130921_185909.log/min_failed/android-tools
  | ../libzipfile/zipfile.c:6:18: fatal error: zlib.h: No such file or directory
  |  #include <zlib.h>
* without openssl it fails to install
  |  * satisfy_dependencies_for: Cannot satisfy the following dependencies for android-tools:
  |  *    libcrypto1.0.0 (>= 1.0.1e) *

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>