This patch adds an install target for illumos and OI

--- zrepl-0.5.0/Makefile-orig	Sun Jan  9 05:51:00 2022
+++ zrepl-0.5.0/Makefile	Wed Apr 20 16:44:47 2022
@@ -230,6 +230,15 @@
 generate-platform-test-list:
 	$(GO_BUILD) -o $(ARTIFACTDIR)/generate-platform-test-list ./platformtest/tests/gen
 
+# Install target for illumos
+.PHONY: install
+install:
+	$(GO_BUILD) -o "$(ARTIFACTDIR)/usr/bin/zrepl"
+	$(ARTIFACTDIR)/usr/bin/zrepl gencompletion bash "$(ARTIFACTDIR)/usr/share/bash-completion/completions/zrepl"
+	$(ARTIFACTDIR)/usr/bin/zrepl gencompletion zsh "$(ARTIFACTDIR)/usr/share/zsh/site-functions/_zrepl"
+	rst2man.py docs/configuration/overview.rst $(ARTIFACTDIR)/usr/share/man/man5/zrepl.yml.5
+	rst2man.py docs/usage.rst $(ARTIFACTDIR)/usr/share/man/man8/zrepl.8
+
 COVER_PLATFORM_BIN_PATH := $(ARTIFACTDIR)/platformtest-cover-$(ZREPL_TARGET_TUPLE)
 cover-platform-bin:
 	$(GO_ENV_VARS) $(GO) test $(GO_BUILDFLAGS) \