RFR: JDK-8216529: in case of a crash, javac should print out the parameters passed to it

Mon Jan 14 18:50:50 UTC 2019

Please review the fix for enhancement [1] at [2]. The idea of this 
enhancement is to print out to a file the arguments passed to javac is 
there is a fatal error or if a hidden option is passed to the compiler. 
This could be very helpful to reproduce some bugs reported by users.

Thanks,
Vicente

PS, thanks to Jon for offline feedback an suggestions

[1] https://bugs.openjdk.java.net/browse/JDK-8216529
[2] http://cr.openjdk.java.net/~vromero/8216529/webrev.00/