Redirect install output of make check into a log file

dbf2ec1a changed make check so that the installation logs get directed
to stdout and stderr. Per discussion on -hackers, this patch restores
saving it to a file. It is now saved in /tmp_install/log, which is
created once per invocation of any make target doing regression tests.

Along the way, add a missing /log/ entry to test_ddl_deparse's
.gitignore.

Michael Paquier.

src/Makefile.global.in

@@ -307,9 +307,10 @@ temp-install:
 ifndef NO_TEMP_INSTALL
 ifeq ($(MAKELEVEL),0)
 	rm -rf '$(abs_top_builddir)'/tmp_install
-	$(MAKE) -C '$(top_builddir)' DESTDIR='$(abs_top_builddir)'/tmp_install install
+	$(MKDIR_P) '$(abs_top_builddir)'/tmp_install/log
+	$(MAKE) -C '$(top_builddir)' DESTDIR='$(abs_top_builddir)'/tmp_install install >'$(abs_top_builddir)'/tmp_install/log/install.log 2>&1
 endif
-	$(if $(EXTRA_INSTALL),for extra in $(EXTRA_INSTALL); do $(MAKE) -C '$(top_builddir)'/$$extra DESTDIR='$(abs_top_builddir)'/tmp_install install || exit; done)
+	$(if $(EXTRA_INSTALL),for extra in $(EXTRA_INSTALL); do $(MAKE) -C '$(top_builddir)'/$$extra DESTDIR='$(abs_top_builddir)'/tmp_install install >>'$(abs_top_builddir)'/tmp_install/log/install.log || exit; done)
 endif
 
 PROVE = @PROVE@

src/test/modules/test_ddl_deparse/.gitignore

+/log/
 /results/