pgsql: pg_combinebackup didn't clean its tmp_check directory, either.

pg_combinebackup didn't clean its tmp_check directory, either.

Another oversight in dc2123400, visible when building/testing
in the source directory. (There's a lot of stuff we could
simplify if we stop supporting that case, but for now it's
still mainstream.)

Branch
------
master

Details
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https://git.postgresql.org/pg/commitdiff/ba08c10fcd7f58486e77166fa93e61ed59962da0

Modified Files
--------------
src/bin/pg_combinebackup/Makefile | 1 +
1 file changed, 1 insertion(+)