RFR (S) 8203479: JFR enabled ARM32 build assertion failure

[Boris Ulasevich]

Hi,

Please review the following patch:
   http://cr.openjdk.java.net/~bulasevich/8203479/webrev.01
   https://bugs.openjdk.java.net/browse/JDK-8203479

Assertion fires in JFR codes on first VM thread setup because VM globals 
are not yet initialized (and supports_cx8 property is not predefined for 
ARM32 platform). I propose to exploit early_initialize() method to set 
up supports_cx8 property on early stage of VM initialization.

Thanks
Boris