RFR(S): 8143963: improve ClassLoader::trace_class_path to accept an additional outputStream* arg

[Calvin Cheung]

Please review this small fix for adding more flexibility to the 
ClassLoader::trace_class_path() function.

This is done mainly to prevent the truncation of the trace output.

JBS: https://bugs.openjdk.java.net/browse/JDK-8143963

webrev: http://cr.openjdk.java.net/~ccheung/8143963/webrev.00/

testing:
     JPRT with -testset hotspot
     tests under tests under hotspot/test/runtime/SharedArchiveFile/

thanks,
Calvin