Fix invalid FFlag in tests

When running the tests, libarchive says:
InvalidFFlag: 'archive' is not a known fflag

So remove that one flag from our tests.

Author: hadess

test.lua

@@ -74,7 +74,7 @@ function test_basic()
 
    -- Test creating our own "normal" entry:
    local normal_entry = {
-      fflags="nosappnd,dump,archive",
+      fflags="nosappnd,dump",
       dev=200,
       ino=1000,
       mode=0x80FF,