[8u20] Request for approval: 8029002: javac should take multiple upper bounds into account in incorporation

[Vicente-Arturo Romero-Zaldivar]

Hi,

This is a backport of a patch that is already in 9.

Bug (8u20): https://bugs.openjdk.java.net/browse/JDK-8029002
Bug (9): https://bugs.openjdk.java.net/browse/JDK-8037878
jdk9 changeset: 
http://hg.openjdk.java.net/jdk9/dev/langtools/rev/cf78452cdb3b

Reviewed by Dan Smith and Jon Gibbons.

Thanks,
Vicente