Summary: To use explicit lobk object.
Reviewed-by: alanb

Summary: Add sync_flush option into Deflater/DefalterOutputStream
Reviewed-by: martin, alanb

6728376: Wrong error handling in Java_java_util_zip_Deflater_deflateBytes leads to size 0 if compress fails
6735255: ZipFile.close() does not close ZipFileInputStreams, contrary to the API document
Summary: Throws OOM when malloc failed. Closes all outstanding streams when closing
Reviewed-by: alanb