Assert privileges while reading the jdk.incubator.vector.VECTOR_ACCESS_OOB_CHECK system property

A trivial use of the Vector API when run with the security manager and a domain that does not grant permissions fails as follows:

java.lang.ExceptionInInitializerError
        at jdk.incubator.vector/jdk.incubator.vector.IntVector.fromArray(IntVector.java:2941)
        at VectorRuns.countRunAscendingVector(VectorRuns.java:80)
        at VectorRuns.main(VectorRuns.java:45)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
        at java.base/java.lang.reflect.Method.invoke(Method.java:580)
        at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:125)
        at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: java.security.AccessControlException: access denied ("java.util.PropertyPermission" "jdk.incubator.vector.VECTOR_ACCESS_OOB_CHECK" "read")
        at java.base/java.security.AccessControlContext.checkPermission(AccessControlContext.java:488)
        at java.base/java.security.AccessController.checkPermission(AccessController.java:1071)
        at java.base/java.lang.SecurityManager.checkPermission(SecurityManager.java:411)
        at java.base/java.lang.SecurityManager.checkPropertyAccess(SecurityManager.java:1146)
        at java.base/java.lang.System.getProperty(System.java:966)
        at java.base/java.lang.Integer.getInteger(Integer.java:1351)
        at java.base/java.lang.Integer.getInteger(Integer.java:1307)
        at jdk.incubator.vector/jdk.incubator.vector.VectorIntrinsics.<clinit>(VectorIntrinsics.java:34)
        ... 7 more