[13] RFR(XXS) 8226533: JVMCI: findUniqueConcreteMethod should handle statically bindable methods directly

[dean.long at oracle.com]

https://bugs.openjdk.java.net/browse/JDK-8226533
http://cr.openjdk.java.net/~dlong/8226533/webrev/

This fixes a problem that shows up with -XX:+BootstrapJVMCI after 
JDK-8223050.  Thanks Doug for the patch.

dl