RFR (S) round 0 for 8135195 VM Options file should not be limited to 1024 bytes

[Ron Durbin]

Here is the round 0 webrev for 8135195

Webrev link: 
http://cr.openjdk.java.net/~rdurbin/Webrevs/JDK-8135195/OCR0_JDK9/webrev/

RFE request:
https://bugs.openjdk.java.net/browse/JDK-8135195

This RFE removes the limitation on the size of VM Options files. That limit is currently 1K bytes.
Removing that limit will allow options files to be read with no practical size limit.

This feature has been tested on:
    OS:
      Solaris, MAC, Windows, Linux
    Tests:
      Manual unit tests
      JPRT with -testset hotspot (including the SQE proposed test coverage for this feature.)