Update Makefile

Try to create a dummy test in the makefile for future improvement.
1 job for master in 17 seconds (queued for 7 seconds)
Status Name Job ID Coverage
failed build #1983


Name Stage Failure
build Build
-- Installing: /usr/local/share/blc/blc-config.cmake
-- Installing: /usr/local/share/blc/blc-config-noconfig.cmake
$ make
[ 89%] Built target objlib
[ 94%] Built target static_blc
[100%] Built target blc
$ make test
make: *** No rule to make target 'test'. Stop.
ERROR: Job failed: exit code 1