RFR (S) 8181143: Introduce diagnostic flag to abort VM on too long VM operations

[Roman Kennke]

>> this looks good to me.
> 
> Thanks for reviews! I fixed "jint" -> "int" in atomic flag to make Windows and Solaris builds happy,
> updated the webrev in-place:
>   http://cr.openjdk.java.net/~shade/8181143/webrev.04/
> 
> Testing: x86_64 build, hotspot tier1, new test, jdk-submit (passed!)

ok, still good :-)

Roman