tests: Fix memory leak in mymain
tests: Fix memory leak in mymain

Commit d2899a648 added a new exit path, but didn't free @fakerootdir.
Let's just use VIR_AUTOFREE instead to make life easier.

Found by Coverity

Signed-off-by: John Ferlan <87558058f6f829e5ec976c8ef960720af4ff9c7d@redhat.com>
Reviewed-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>

nertpinx/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,nertpinx/libvirt,olafhering/libvirt,libvirt/libvirt,zippy2/libvirt,nertpinx/libvirt,libvirt/libvirt,andreabolognani/libvirt,olafhering/libvirt,zippy2/libvirt,jardasgit/libvirt,jardasgit/libvirt,crobinso/libvirt,jfehlig/libvirt,jfehlig/libvirt,jardasgit/libvirt,crobinso/libvirt,crobinso/libvirt,libvirt/libvirt,olafhering/libvirt,andreabolognani/libvirt,nertpinx/libvirt,jardasgit/libvirt,libvirt/libvirt,andreabolognani/libvirt,crobinso/libvirt,fabianfreyer/libvirt,zippy2/libvirt,jardasgit/libvirt,nertpinx/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,zippy2/libvirt,olafhering/libvirt,jfehlig/libvirt