makebindist.sh: Create 'releases' dir if non-existent.
Fix regressions when reading ZLIB-compressed UDIF disk images.

hfsx_dmglib.jar is updated to include the following commit (and its
ancestors):
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UDIFBlockInputStream.java: Fix regressions in ZlibBlockInputStream.

These regressions were introduced during a commit labeled "Code
reformatting, documentation and cleanup.". Apparently the code
reformatting also introduced new changes which weren't tested properly.

Fixed by reverting the (most likely unintended) changes to
ZlibBlockInputStream that were introduced in this commit.
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