[aarch64-port-dev ] aarch64: Fix a bug in TestOptionsWithRanges of hotspot

[Yang Zhang]

Hi

Could someone please help to review and process attached patch for fixing
an issue about BlockZeroingLowLimit in hotspot openjdk9 aarch64?

This issue is exposed by a test failure in hotspot jtreg openjdk9 for
aarch64

runtime/CommandLine/OptionsValidation/TestOptionsWithRanges.java

It is caused by improper range of BlockZeroingLowLimit.

The issue can be reproduced by command as follows:

$ java -server -XX:+UseG1GC -XX:BlockZeroingLowLimit=2147483647

The attached patch can fix this issue and the jtreg test failure above (and
no new failure found).

Regards
Yang