relocate applypatch; check patch integrity

- Delete the applypatch code (it's being moved to bootable/recovery).

- Change the OTA script generator to verify the sha1sum of all the
  patch files after they are unpacked into /tmp.

b/2361316 - VZW Issue PP628: Continuous reset to Droid logo:
            framework-res.apk update failed (CR LIBtt59130)

Change-Id: I5858d48f10127f72e708d50d3de844569d1aff27

tools/releasetools/edify_generator.py

@@ -113,7 +113,7 @@ class EdifyGenerator(object):
   def PatchCheck(self, filename, *sha1):
     """Check that the given file (or MTD reference) has one of the
     given *sha1 hashes."""
-    self.script.append('assert(apply_patch_check("%s"' % (filename,) +
+    self.script.append('assert(sha1_check(read_file("%s")' % (filename,) +
                        "".join([', "%s"' % (i,) for i in sha1]) +
                        '));')