[12] RFR(S) 8207153: Some intrinsic tests take long time to run

[Vladimir Kozlov]

http://cr.openjdk.java.net/~kvn/8207153/webrev.00/
https://bugs.openjdk.java.net/browse/JDK-8207153

Use WhitBox API isIntrinsicAvailable() to guard execution of TestAESMain.java and TestBase64.java.
Also reduced number of loop iterations from 1M to 100K. Tests run with -Xbatch - compilation is guarantee with smaller 
number. And I checked results with +LogCompilation.

Tested by running these 2 tests on X86 and SPARC.
And run locally using intrinsics flag to switch them off to confirm that new guard in tests works.

-- 
Thanks,
Vladimir