RFR(T) : 8225450 : use @file in CtwRunner

[Igor Ignatyev]

thanks Vladimir! pushed.

-- Igor
> On Jun 6, 2019, at 11:51 AM, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:
> 
> Good.
> 
> Thanks,
> Vladimir
> 
> On 6/6/19 11:35 AM, Igor Ignatyev wrote:
>> http://cr.openjdk.java.net/~iignatyev//8225450/webrev.00/index.html
>>> 34 lines changed: 5 ins; 0 del; 29 mod;
>> Hi all,
>> could you please review this trivial patch for CtwRunner which makes it more robust?
>> from JBS:
>>> I've noticed that CtwRunner might fail when used to compile a big set of jar files on windows due to exceeding command line length limit. the fix is to save command line to a file and pass this file to java launcher as @file.
>> webrev: http://cr.openjdk.java.net/~iignatyev//8225450/webrev.00/index.html
>> JBS: https://bugs.openjdk.java.net/browse/JDK-8225450
>> testing:
>>  - test/hotspot/jtreg/applications/ctw/modules
>>  - manually check that the previously failing execution works on windows
>> Thanks,
>> -- Igor