Add basic TAP test setup for pg_upgrade

The plan is to convert the current pg_upgrade test to the TAP
framework.  This commit just puts a basic TAP test in place so that we
can see how the build farm behaves, since the build farm client has some
special knowledge of the pg_upgrade tests.

Author: Michael Paquier <michael.paquier@gmail.com>

src/bin/pg_upgrade/Makefile

@@ -36,8 +36,9 @@ clean distclean maintainer-clean:
 	       pg_upgrade_dump_globals.sql \
 	       pg_upgrade_dump_*.custom pg_upgrade_*.log
 
-check: test.sh all
+check: test.sh
+	$(prove_check)
 	MAKE=$(MAKE) bindir=$(bindir) libdir=$(libdir) EXTRA_REGRESS_OPTS="$(EXTRA_REGRESS_OPTS)" $(SHELL) $< --install
 
-# installcheck is not supported because there's no meaningful way to test
-# pg_upgrade against a single already-running server
+installcheck:
+	$(prove_installcheck)

src/bin/pg_upgrade/t/001_basic.pl

@@ -0,0 +1,9 @@
+use strict;
+use warnings;
+
+use TestLib;
+use Test::More tests => 8;
+
+program_help_ok('pg_upgrade');
+program_version_ok('pg_upgrade');
+program_options_handling_ok('pg_upgrade');