iotests: Make 059 pass on machines with little RAM

Signed-off-by: NMax Reitz <mreitz@redhat.com>
Message-id: 20171129192411.6637-1-mreitz@redhat.com
Reviewed-by: NJohn Snow <jsnow@redhat.com>
Signed-off-by: NMax Reitz <mreitz@redhat.com>

tests/qemu-iotests/059

@@ -152,7 +152,9 @@ done
 echo
 echo "=== Testing afl image with a very large capacity ==="
 _use_sample_img afl9.vmdk.bz2
-_img_info
+# The sed makes this test pass on machines with little RAM
+# (and also with 32 bit builds)
+_img_info | sed -e 's/Cannot allocate memory/Invalid argument/'
 _cleanup_test_img
 
 # success, all done