[8u40] Request for approval: 8058112: Invalid BootstrapMethod for constructor/method reference

[Robert Field]

Please approve backport from JDK9 to JDK8u40.  After adjusting for the 
extra level of directory structure in jdk9/langtools/src, applies cleanly.

Bug: https://bugs.openjdk.java.net/browse/JDK-8058112
JDK9 changeset: 
http://hg.openjdk.java.net/jdk9/dev/langtools/rev/3c5de506a1f2
Reviewers: dlsmith, vromero