RFR (S) 8220656 : ARM32: -XX:MaxVectorSize=16 makes SIGILL

[Boris Ulasevich]

Hi all,

Please review a simple change to prevent VLD1/VST1 instructions 
generation on ARM32 processor without SIMD support. The change overrides 
MaxVectorSize option set up by user to a value acceptable by the hardware.

https://bugs.openjdk.java.net/browse/JDK-8220656
http://cr.openjdk.java.net/~bulasevich/8220656/webrev.01/

thanks,
Boris