Also removed the travis test for java 1.6.
Java 1.7 version of dx.jar compiled with plaform/libcore at commit
c3e562a and platform/dalvik at commit db9197b with
https://android-review.googlesource.com/#/c/221127/1 cherry-picked on
top of it.
Recently support has been added to AOSP for generating and running
version 037 dex files. In order to load these we update the dx.jar
with a recent version built from AOSP.
Alex Light
Skylot
Bjoern Kerler