Clean up after TAP tests in oid2name and vacuumlo.

Oversights in commits 1aaf532de and bfea331a5.  Unlike the case for
traditional-style REGRESS tests, pgxs.mk doesn't have any builtin support
for TAP tests, so it doesn't realize it should remove tmp_check/.
Maybe we should build some actual pgxs infrastructure for TAP tests ...
but for the moment, just remove explicitly.

contrib/oid2name/Makefile

@@ -9,6 +9,8 @@ OBJS	= oid2name.o $(WIN32RES)
 PG_CPPFLAGS = -I$(libpq_srcdir)
 PG_LIBS_INTERNAL = $(libpq_pgport)
 
+EXTRA_CLEAN = tmp_check
+
 ifdef USE_PGXS
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)

contrib/vacuumlo/Makefile

@@ -9,6 +9,8 @@ OBJS	= vacuumlo.o $(WIN32RES)
 PG_CPPFLAGS = -I$(libpq_srcdir)
 PG_LIBS_INTERNAL = $(libpq_pgport)
 
+EXTRA_CLEAN = tmp_check
+
 ifdef USE_PGXS
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)