[tvm4j] fix java build (#1471)

Makefile

jvm/README.md

jvm/assembly/linux-x86_64-cpu/pom.xml

jvm/assembly/linux-x86_64-gpu/src/main/assembly/assembly.xml

jvm/assembly/linux-x86_64/pom.xml

jvm/assembly/linux-x86_64/src/main/assembly/assembly.xml

jvm/assembly/osx-x86_64/pom.xml

jvm/assembly/osx-x86_64/src/main/assembly/assembly.xml

jvm/assembly/pom.xml

jvm/conf/log4j.properties

jvm/core/pom.xml

jvm/core/src/main/java/ml/dmlc/tvm/Base.java

jvm/core/src/test/java/ml/dmlc/tvm/ModuleTest.java

jvm/core/src/test/scripts/test_add_gpu.py

jvm/native/linux-x86_64-cpu/pom.xml

jvm/native/linux-x86_64/pom.xml

jvm/native/osx-x86_64/pom.xml

jvm/native/pom.xml