[15] RFR (S): 8241433: x86: Add VBMI CPU feature detection

[Vladimir Ivanov]

http://cr.openjdk.java.net/~vlivanov/8241433/webrev.00/
https://bugs.openjdk.java.net/browse/JDK-8241433

Add VBMI CPU feature detection logic on x86.

Also, filled in missing declarations for existsing VM_Version constants 
in vmStructs_x86.hpp and vmStructs_jvmci.cpp.

Testing: tier1-4

Thanks!

Best regards,
Vladimir Ivanov