virfiletest: Fix test name prefix for virFileInData test

Because of lacking virTestCounterReset() call, the old test cases
name was preserved.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJiri Denemark <jdenemar@redhat.com>

tests/virfiletest.c

@@ -388,6 +388,7 @@ mymain(void)
     } while (0)
 
     if (holesSupported()) {
+        virTestCounterReset("testFileInData ");
         DO_TEST_IN_DATA(true, 4, 4, 4);
         DO_TEST_IN_DATA(false, 4, 4, 4);
         DO_TEST_IN_DATA(true, 8, 8, 8);