[8u] approval request for 8137134: invokespecial on indirect super interface is generated by Java adapter generator

[Sundararajan Athijegannathan]

Please approve.

bug: https://bugs.openjdk.java.net/browse/JDK-8137134
jdk9 review thread: 
http://mail.openjdk.java.net/pipermail/nashorn-dev/2015-September/005314.html
jdk8u webrev: http://cr.openjdk.java.net/~sundar/8137134/8u/webrev.00/

Apart from modular source layout difference, I had to make a slight 
change in makefiles to compile tests with -source 1.8 (so that test 
using "default" method can be compiled).

Thanks,
-Sundar