[11u] RFR(S) 8212204: [TESTBUG] test/hotspot/jtreg/compiler/intrinsics/base64/TestBase64.java fails

[Vladimir Kozlov]

http://cr.openjdk.java.net/~kvn/8212204/webrev.00/
https://bugs.openjdk.java.net/browse/JDK-8212204

Backport of JDK-8207153 pushed tests which use jtreg.SkippedException into jdk 11 where this class 
is not available. Also new jtreg is required for jtreg.SkippedException but jdk 11 testing do not 
set new version as required.

I suggest a point fix which replace jtreg.SkippedException with print statement and return.

I ran tier1 testing and tested all failed tests separately on all platforms. All passed.

Thanks,
Vladimir