Problem: [jni] `gradle clean` doesn't clean the cmake part
Problem: [jni] `gradle clean` doesn't clean the cmake part

Solution: make gradle remove the CMakeCache.txt file when `gradle clean`
is invoked.

twhittock/zproject,taotetek/zproject,zeromq/zproject,twhittock/zproject,zeromq/zproject,taotetek/zproject,eburkitt/zproject,paddor/zproject,zeromq/zproject,paddor/zproject,paddor/zproject,eburkitt/zproject,taotetek/zproject