RFR: [CSR] 8287026: Changes related to overflow handling in Random.doubles

[Raffaello Giulietti]

Please review this CSR [1], whose aim is to bring the extended behavior of the 
PR [2] in sync with the spec.

Greetings
Raffaello

----

[1] https://bugs.openjdk.java.net/browse/JDK-8287026
[2] https://git.openjdk.java.net/jdk/pull/8791