build: pass version and patch level to mkbootimg

Add --os_version and --os_patch_level arguments to mkbootimg.

Needs matching changes from
  I57682611e0c27fec5ed284da7d9a788383ff98b1

Bug: 27498078
Bug: 22914603
Change-Id: I04e20b0de40d864aac92ac7bcf466a6cbde3d0e4
(cherry pick from commit 8fb47f191f)

tools/releasetools/common.py

@@ -414,6 +414,10 @@ def _BuildBootableImage(sourcedir, fs_config_file, info_dict=None,
   if args and args.strip():
     cmd.extend(shlex.split(args))
 
+  args = info_dict.get("mkbootimg_version_args", None)
+  if args and args.strip():
+    cmd.extend(shlex.split(args))
+
   if has_ramdisk:
     cmd.extend(["--ramdisk", ramdisk_img.name])