build: Merge the mkdir_t_tmp target into the check target

scripts/Makefile.am

@@ -172,10 +172,8 @@ clean-local:
 	[ ! -d t.tmp ] || chmod -R +w t.tmp
 	rm -fr t.tmp
 
-mkdir_t_tmp:
+check: $(TEST_FILES) $(wildcard $(srcdir)/t/200_Dpkg_Shlibs/ld.so.conf*)
 	$(mkdir_p) t.tmp
-
-check: $(TEST_FILES) $(wildcard $(srcdir)/t/200_Dpkg_Shlibs/ld.so.conf*) mkdir_t_tmp
 # a bit hacky...
 	cp -dRl $(srcdir)/t/200_Dpkg_Shlibs/ld.so.conf* t.tmp/
 	PATH="$(top_builddir)/src:$(top_builddir)/scripts:$(PATH)" srcdir=$(srcdir) PERL5LIB=$(srcdir) DPKG_DATADIR=$(srcdir)/.. PERL_DL_NONLAZY=1 $(PERL) -I$(srcdir) "-MExtUtils::Command::MM" "-e" "test_harness($(TEST_VERBOSE), '.')" $(TEST_FILES)