tests: fix the return value of test-wrap-argv
tests: fix the return value of test-wrap-argv

The script was returning success unless it failed on the last file.
This went unnoticed because sc_prohibit_long_lines forbids lines
longer than 90 characters in .arg[sv] files.

jardasgit/libvirt,jardasgit/libvirt,crobinso/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,zippy2/libvirt,jfehlig/libvirt,nertpinx/libvirt,zippy2/libvirt,olafhering/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,andreabolognani/libvirt,crobinso/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,eskultety/libvirt,crobinso/libvirt,libvirt/libvirt,zippy2/libvirt,datto/libvirt,eskultety/libvirt,datto/libvirt,olafhering/libvirt,eskultety/libvirt,nertpinx/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,taget/libvirt,taget/libvirt,libvirt/libvirt,fabianfreyer/libvirt,datto/libvirt,zippy2/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,datto/libvirt,jardasgit/libvirt,jfehlig/libvirt,taget/libvirt,jardasgit/libvirt,VenkatDatta/libvirt,nertpinx/libvirt,jfehlig/libvirt,jardasgit/libvirt,taget/libvirt,eskultety/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,olafhering/libvirt,libvirt/libvirt,datto/libvirt,eskultety/libvirt,crobinso/libvirt,VenkatDatta/libvirt,libvirt/libvirt,taget/libvirt,VenkatDatta/libvirt,olafhering/libvirt