Fix typo in gdb.ada/complete.exp test

I noticed that two tests in gdb.ada/complete.exp are testing the same
thing: the completion of "p pck.inne".  The second such test has this
comment:

    # A fully qualified package name

I believe the intent here was to test "p pck.inner" (note the trailing
"r").  This patch makes this change.
1 file changed