RFR(S): 8034188 OSR methods may not be recompiled at proper compilation level after deoptimization

[Nils Eliasson]

Hi,

This bug fixes a bug in the tiered policy that may cause deoptimized 
osr-nmethods not to be recompiled at the correct level.

Webrev: http://cr.openjdk.java.net/~neliasso/8034188/webrev/

Testing: Reproduced by running IsMethodCompilable test.

Thanks,
//Nils