RFR(S): 8145566: PrintNMethods compile command broken since b89

[Nils Eliasson]

Hi,

Please review this patch. Fixes an issue where TypedOptionMatchers freed 
their Symbols twice (already decremented in super class destructor). 
This affects CompileCommand option after a while when the Symbols are 
cleaned.

Bug: https://bugs.openjdk.java.net/browse/JDK-8145566
Webrev: http://cr.openjdk.java.net/~neliasso/8145566/

Regards,
Nils