[9] RFR (XS): 8075266: Show runtime call details when printing machine code

[Vladimir Ivanov]

http://cr.openjdk.java.net/~vlivanov/8075266/webrev.00/
https://bugs.openjdk.java.net/browse/JDK-8075266

Small enhancement to make generated assembly output more descriptive: 
print code blob name runtime call points to.

Examples:
   - {runtime_call ic_miss_stub}

   - ; OopMap{[16]=NarrowOop off=348}
     ;*if_icmpne
     ; - java.lang.String::indexOf at 49 (line 1562)
     ;   {runtime_call UncommonTrapBlob}

   - {runtime_call DeoptimizationBlob}


Testing: manual (looked at -XX:+PrintAssembly output).

Best regards,
Vladimir Ivanov

PS: I considered adding a special case for os::breakpoint (debug builds 
insert such calls everywhere, but I didn't want to enumerate symbols to 
decode arbitrary functions), but decided it doesn't add much. Let me 
know if you think it is useful.