RFR: JDK-8049516: sun.security.provider.SeedGenerator throws ArrayIndexOutOfBoundsException

[Jamil Nimeh]

Hello all,

This fixes a bug found in stress testing where on faster CPUs the latch 
can overflow resulting in a negative array index.  The fix avoids the 
overflow by resetting the latch to 0 when it reaches Integer.MAX_VALUE - 
1 and will continue increasing from there.

Bug: https://bugs.openjdk.java.net/browse/JDK-8049516
Webrev: http://cr.openjdk.java.net/~jnimeh/reviews/8049516/webrev.01/

Thanks,
--Jamil