RFR(XS): 8212706 : nmethod jvmci_installed_code_name need to be XML escaped

[Eric Caspole]

Hi everybody,
Could I have reviews for this small change to emit well-formed XML with 
LogCompilation when using Graal:

JBS:
https://bugs.openjdk.java.net/browse/JDK-8212706

webrev:
http://cr.openjdk.java.net/~ecaspole/JDK-8212706/webrev/

Thanks,
Eric