Minor "require" fixups
authorTom Tromey <tom@tromey.com>
Wed, 25 Jan 2023 16:43:03 +0000 (09:43 -0700)
committerTom Tromey <tom@tromey.com>
Fri, 27 Jan 2023 01:28:31 +0000 (18:28 -0700)
commiteacd228909680afd71ba4e36e64b147c402b6802
tree111d16724378d8c8755b6baab753d8344ba18bb4
parente1a772ad89bc1103182168b46513900aa035a81e
Minor "require" fixups

I found a couple of spots that could use "require", and one spot where
hoisting the "require" closer to the top of the file made it more
clear.
gdb/testsuite/gdb.btrace/enable.exp
gdb/testsuite/gdb.mi/list-thread-groups-available.exp