maint: really fix wildcard quoting in sc_tests_executable

maint: really fix wildcard quoting in sc_tests_executable

* cfg.mk (sc_tests_executable): The previous commit avoided
the globbing, but also passed on the quoted wildcards to find(1).
We could use eval to handle the quoting, though that's a bit
awkward and dangerous, so instead explicitly disable globbing
for the whole make target subshell.  Note noglob is not available
on solaris, where we fall back to set -f.  Note also that zsh
uses set -F for this, but that's moot here.  Also correct the
find(1) expression to include the -o between each wildcard.