Add some missing qtest binaries to .gitignore

These binaries are generated during make check on at least some
configurations, so att them to .gitignore.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

tests/.gitignore

@@ -4,11 +4,18 @@ check-qint
 check-qjson
 check-qlist
 check-qstring
+test-aio
+test-cutils
+test-hbitmap
+test-iov
+test-mul64
 test-qapi-types.[ch]
 test-qapi-visit.[ch]
 test-qmp-commands.h
 test-qmp-commands
 test-qmp-input-strict
 test-qmp-marshal.c
+test-thread-pool
 test-x86-cpuid
+test-xbzrle
 *-test