Install install-sh with the other config files.
Could be useful for an install target in Misc/Makefile.pre.in.
diff --git a/Makefile.in b/Makefile.in
index 6be4caf..bfa7bdb 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -361,6 +361,7 @@
$(INSTALL_DATA) Modules/Setup $(LIBPL)/Setup
$(INSTALL_DATA) Modules/Setup.local $(LIBPL)/Setup.local
$(INSTALL_PROGRAM) $(srcdir)/Modules/makesetup $(LIBPL)/makesetup
+ $(INSTALL_PROGRAM) $(srcdir)/install-sh $(LIBPL)/install-sh
# Install the dynamically loadable modules
# This goes into $(exec_prefix)