Various other test and utility programs exist within the CLAVR-x
codebase and can now be built along with the default/main executable(s)
using this mechanism.  This mechanism is activated/configured using a new
section ("[Other Executables to Build]") in the build configuration file
('build/env_settings/user_change_me.cfg').
To obtain a current list of such programs (that have been pre-configured):
           grep -rin '%EXE' src/
    ... the names within the '()' are valid options to list below.

Also fixed the "LIB+EXE" functionality introduced in a recent commit.