[8u60] Request for approval 8055963: Inference failure with nested invocation

[Maurizio Cimadamore]

Hello,
This is a request for approval to backport a fix from the jdk9 to the 
jdk8u-dev repository.
Changes applies cleanly to jdk8u-dev after path reshuffling. All 
relevanttests pass.

Bug: https://bugs.openjdk.java.net/browse/JDK-8055963
jdk9 fix: http://hg.openjdk.java.net/jdk9/dev/langtools/rev/c419bddef7f3

Cheers
Maurizio