Fix some clatd cloexec and file descriptor leaking via missing close()

Not terribly important since clatd doesn't exec anything,
but was muddying the waters while I was searching for other
fd-survives-across-exec leakage in netd.  While at it also
fix another leaked fd which we forgot to close().

Test: builds and boots

Bug: 131268436
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Iceb7d4052dc9be29db5c7bb3fe2ee27da7864379
Merged-In: Iceb7d4052dc9be29db5c7bb3fe2ee27da7864379
(cherry picked from commit 60bce378cfa29463f57756fc724d1572747f4fc5)