Missing "total-clean" in tests/geolocation/GNUMakefile and tests/agemat/GNUMakefile

[yukio-takeuchi]

On Ubuntu 18.04
make g++-all
command failed when

make --directory=geolocation total-clean

is called from command $(MAKE) --directory=src CC=gcc CXX=g++ copy which is third command of make g++-all with following error message

make[4]: Entering directory '/home/yukiot/repository/admb/build/admb/tests/geolocation'
make[4]: *** No rule to make target 'total-clean'.  Stop.

In fact tests/geolocation/GNUMakefile lacks total-clean. tests/agemat/GNUMakefile also lacks total-clean.

They caused failure to build.
Probably this error should occur with other C++ compilers on Linux and Mac as well.

[johnoel]

Also needed bc2eb9a

[johnoel]

The total-clean target in tests directory is used mainly to remove downloaded git repositories such as glmmadmb and geolocation. The make --directory=tests total-clean target should be run BEFORE the top level make all target is called. If not, all downloaded files will be copied to the build/admb directory.

[johnoel]

Add e649a1c