RFC: Minor patch to set JDK_UPDATE_VERSION based on drop

[Deepak Bhole]

As discussed earlier, based on Mark's suggestion, here is a patch to set
the JDK update version based on the drop version. I tested it with
icedtea6 head and it seems to work correctly.

ChangeLog:
2009-12-22  Deepak Bhole <dbhole at redhat.com>

    * Makefile.am: Set JDK_UPDATE_VERSION based on upstream drop version

Cheers,
Deepak