[8u20] Request for approval for JDK-8034223: Most-specific should not have any special treatment for boxed vs. unboxed types

[Dan Smith]

Please approve backport of this langtools bug fix from 9 to 8u20.  It's a significant enough change to overload resolution that it received CCC approval.

Bug report: https://bugs.openjdk.java.net/browse/JDK-8034223
CCC: http://ccc.us.oracle.com/8034223
Changeset: http://hg.openjdk.java.net/jdk9/dev/langtools/rev/4525f3a38730
jdk9 reviewer: vromero

—Dan