RFR: 6445283: ProgressMonitorInputStream not large file aware (>2GB)

[Prasanta Sadhukhan]

If ProgressMonitor has to show progress for reading file > 2GB, it goes to 100% and then again start from 0. 
This is because
it uses "int" to store bytes read (`nread`) and when it reads data from file, it adds 
"number-bytes-to-read "nr" to number-bytes-already-read "nread" variable [`nread += nr`] which can cause it to overflow and so "nread" becomes -ve.

Fix is to check if adding bytes-to-read to number-bytes-already-read will exceed MAX_INT, then set Progress to max so that ProgressMonitor can close the tracker 
https://github.com/openjdk/jdk/blob/master/src/java.desktop/share/classes/javax/swing/ProgressMonitor.java#L265

No regression test is added as it involves using filesize of >2GB.

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Commit messages:
 - 6445283: ProgressMonitorInputStream not large file aware (>2GB)

Changes: https://git.openjdk.org/jdk/pull/9588/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9588&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-6445283
  Stats: 21 lines in 1 file changed: 18 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/9588.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9588/head:pull/9588

PR: https://git.openjdk.org/jdk/pull/9588