Created by: fkorotkov
Travis is failing with:
com.android.dx.cf.iface.ParseException: bad class file magic (cafebabe) or version (0034.0000)
at com.android.dx.cf.direct.DirectClassFile.parse0(DirectClassFile.java:476)
at com.android.dx.cf.direct.DirectClassFile.parse(DirectClassFile.java:406)
...
...while parsing com/facebook/buck_generated/AppWithoutResourcesStub.class
...
BUILD FAILED: //src/com/facebook/buck/android/agent:agent#dex_uber_r_dot_java failed with exit code 1:
This change fixes the issue by explicitly setting language level to 7.